Eric,
I find I rarely agree with Andrew's posts, I find them rather biased and somewhat ignorant, but he is entitled to them. In the case of Sampras, I feel Sampras had excellent touch, and I feel you hit the nail on the head when you mentioned it is all the more impressive with such a heavy racquet. Note, that others who have paid great accolades to Sampras' touch include Mcenroe, Gilbert, Courier and many others.
Yes. You are correct, that Annacone pushed for increasing SV from Pete, and Sampras began to do this more, as his stamina and legs were beginning to betray him more and more. Imagine how devastating his SV would have been had he done it more in his mid and early 20's?
I don't really agree with seperating Sampras' serve from his volleys. To me, that is rhetorical nonsense. At what point to do you draw the line? Everyone...(well...a few posters excluded), recognized Sampras devastating net game, and knew he could and would back up that serve, if he was coming in. Just because his serve was a huge weapon does not make his volley game any lesser....it simply meant he needed to use it a bit less! lol. But almost every SV'er used his serve as a big weapon. Becker, Krajicek, heck, Gonzalez, Tanner, Ashe etc. all hit aces, and all hit winners. (admittedly in the past, the mindset was less ace oriented). However, just because Sampras had such a good second serve that he could afford to go all out on the first, does not take away from his SV game! Even Edberg, and definitely Mcenroe, hit aces....people forget that....Rafter also hit plenty of big serves for aces and winners...Rafter and Mcenroe often went for big first serves, and only backed off, if their opponent was being too effective on the 2nd serve. Edberg often did use a kicker for his 1st, (but still mixed flat and slice serves in), but part of the reason for that was simply that it happened to be his BEST serve! He even had a great kicker as a young boy, so, he built his game around that! If you need to go for that first serve because you can't really volley, then yes, maybe you are not really a SV'er, but that clearly wasn't the case with Sampras.