I nearly started a thread on the Wallace article, so I am glad it has come up here. The author goes fairly in-depth regarding the sweet spot of the modern racket and concludes that
"Subtlety, touch, and finesse are not dead in the power-baseline era. For it is, still, in 2006, very much the power-baseline era: Roger Federer is a first-rate, kick-ass power-baseliner. It’s just that that’s not all he is. There’s also his intelligence, his occult anticipation, his court sense, his ability to read and manipulate opponents, to mix spins and speeds, to misdirect and disguise, to use tactical foresight and peripheral vision and kinesthetic range instead of just rote pace — all this has exposed the limits, and possibilities, of men’s tennis as it’s now played."
This is something that is largely ignored by the golf distancephobics, that today's professionals do more, not less, with modern equipment.