Recently when I've been doing freestyle turns I noticed I'd flip, put my hands together, then lock my streamline as I was pushing off.
Lately I've been concentrating on locking my streamline sooner. Doing it before I pushed off, I think it allows to a more powerful push and a longer faster streamline glide.
Pay attention to when you streamline when you do flip turns and attempt to lock your streamline sooner. It may help you swim faster faster.
Swim Faster Faster Index: Updated Oct 17th, 2012
SFF Index PART 2