Yes, if your technique is poor, don't use a heavy stick... and No
.... Baseball players cork their bats to speed up their swing and hit the balls further. So, light = more speed = more power and distance. That's why corked bats are illegal. Granted it feels great to hit tennis balls with a heavier frame, (I played with a 13 oz. frame for years), but the additional speed seems to mean more than the additional weight in terms of how it effects a ball. In a certain sense, it's harder to feel good using a lighter frame against heavy hitter, because if you miss the sweet spot, the frame gets pushed around more, but for me, I give my opponents much more trouble with a lighter, more powerful frame....