Haha i asked myself the same question sometimes ago
I couldn't have given a better explanation of this serve "trick".
I found it cheesy at the beginning but now i think it's ok - I mean, if you had to go at the net everytime you are using r1, your opponent will know it thanks to the different animation of the player and so he will make a short return in the feet everytime, instead of the very high and long return that he usually plays.
I think pushing r1 button make better service as you said but as we all have to serve from the T, it doesn't matter too much and gives to the game a little more difficulty and variety. But I definitly agree that it's pissing me off when my opponent do that on the CM with a wide serve and a 98/98 babb!^^
Btw, i saw a video of you Burna747, your davydenko vs agassi at the Aegon final ITST!^^you played very well, even if your opponent wasn't the best agassi i saw, you had a huge disadvantage with your perso! congrats for your win vs this chessy agassi!
I watched many top spin video, but i think that your are the guy with the game the most similar to mine! But...better!^^
I mean, i make same placement, same point construction, same choices or alternance between control/power shot...that's crazy! but to be honnest, you do all of that...a little better than me, which is a huge difference at the end!
I would be happy to play vs you (ps3 right?), you can add me "chris_high"
See you
!