Ban Junk Rubbers!

Agreed.  I'm not a chopper, but I would think the in-and-out movement of choppers against short drop shots is the most physically exerting part of table tennis:

Samsonov is also older than Joo as well.  

 

I just think that you are not paying attention. 

First, you are lumping Pushblockers in with choppers.  Again, I'll repeat, pushblockers are NOT choppers!  Your most basic understanding of what a chopper is appears incorrect. 

Next, in response to your argument that JSH would not be competing at his age if it were not for chopping.  Again, you are incorrect!  There are many more advanced-aged attackers competing at a high-level than there are choppers.  Examples were already provided.
Also, there are WAY more attackers at the club level than choppers who are of advanced age.  Just go to your club.  Tally the amount of senior citizens playing double inverted.  Look at the US open.  One of my coaches, Charlene Liu, is over 60 and has been over 2000 since she was a teenager, she won the seniors open at the US open.  Her husband is 2200 and is a Cpen attacker with double inverted, together they won the seniors doubles event at the US open.  Speaking of the US open, did anyone in the Seniors division even compete as a chopper?  I don't think so, not sure, but I don't think so.

The lady you site as an example of aged chopping is the exception and not the rule, and I'd gather there are other factors contributing to her high level play other than her material.  (I think someone stated some reasons above.  So your theory is debunked their...big time.

Last, the difference between chopping and looping in terms of  stroke exertion is minimal.  But the difference is footwork exertion, and core exertion is VAST.  It's much harder in terms of calories burned.  You can keep telling yourself this isn't so, but you'd be wrong.  I work in medicine, and the muscles of legs and core take up the vast majority of your glucose uptake in both daily live, and during an athletic event. 

This is generally inaccurate.  There are many "long" pips out there with different qualities, and more sponge in general tends to allow for more grip than less but the simplest way to tell how much spin something can generate is to do a floor serve or a large stroke with it. You will get largely spinless balls if you serve with real long pips, no matter how much sponge, though there might be enough spin to make the ball not wobble in the air.

IF you read some of Greg's articles on long pips (and in fact, the OP video is an excellent tutorial on what it takes to learn to play them), you will see he covers all the major bases on how long pips work.

Long pips can add to or reduce spin, but when dealing with heavy spin or even no spin, the ability to change the spin is limited, except from high level players with extremely good touch.  The only stroke that can help is a punch/spin killing stroke but even that may not take all the spin off.

The "wobble" you referred to is actually caused by killing the spin when a hit/punch stroke is performed with the long pips.  The sideswipe strokes from long pips players do just about the same thing as other strokes (add to or reduce spin but leave it largely unchanged).

Just like an inverted player can change what he is doing with touch, so can the long-pips player but heavy spin is heavy spin.  It's hard to do something to heavy spin close to the table without giving the game way.

As ZingyDNA points out, you keep missing the point.  It is not simply about the effort in the stroke.  It is about the effort needed to actually employ a game strategy based around chopping or attacking a chopper.

And I don't think I am missing points, turber, i addressed the main message in what is probably greater than appropriate detail on page 1. This is one particular item that was challenged separately.

cole_ely wrote: Although I agree with you, it makes sense that the grunting would come from the player who's energy is expended in short bursts.  The chopper in theory is expending his energy covering ground.  It would sound funny if a chopper grunted, say, on the push off.

I grunt when I block... is that weird?