Re: New racquet time!
You are quite right HowardH and pros do use their wrists, but I don't tell it to people that I am teaching tennis too, because it is quite to develop a bad habit of flicking the wrist on short swings and then imagine that this is what pros are doing.
I do have played against those people who come from a table tennis background and though they might think they are playing tennis (I call their game playing touch with the ball), and might get good results for their unconventional game but in the end they can be defeated easily if you return the ball hard to them or if you bring them to the net and hit the ball toward them. Why does this happen? Because the mechanics of table tennis and tennis are different and you can't easily use the same skills in both sports.
One of the such people was so furious that broke his racket in our club after 6-0 6-0 loss, and even though it was a casual game, he wouldn't leave the court and was standing by the net in a very depressed stance for almost half an hour. My best guess for his odd behavior after the loss was that he thought he is a great player (and indeed he must have been a great table tennis player, no doubts about that), but he was must have been irritated that his skills fell short for returning my shots. Whereas if he had learned tennis in the way this game is actually played, he would have had a slow but consistent progress and would have known his weaknesses and strengths. So IMHO it is better to get disappointed in the beginning by knowing that you have to develop different kind of strokes to table tennis than getting disillusioned with with/after a bad loss.
Championship: TP3 Wimbledon 2011, Suicide Tennis New Haven 2011
RUP: TT Doubles AO 2012
May the HAMMER smash the cross