K-Lo,
I actually find this humorous, TDA Rule #45 is one of the rules I like. You are suggesting a change. I'll stick my neck out and give my definition of a player's turn to act.
No-limit: After the active player on your right acts, you may:
a.) If a bet is made you may fold, call, or raise.
b.) If you are facing a check, you may check or bet.
Finally
c.) If you are first to act you my check, or bet.
What keeps us apart is whether a player that announces his intention to raise, should be recognized as a complete action until the amount is stated, or pushed into the betting area.
I'm thinking that once the player announces that he is raising, he has acted because he can not retract his bet! In my opinion waiting for the player to announce how much he is going to raise will only waste time and slow the game down needlessly.