Just downloaded the 1.5.2 beta and noticed that my fps code is spitting out like ~1400 fps a second. Before it would always give me the refresh rate. So I am guessing that the vsync is now unlocked? My code is a simple paints++; every pass through render(). The values of paints is displayed once every second.
I discovered something similiar, I think 
If I use one buffer in my bufferstrategy the FPS goes up, guess it’s not pageFlipped, seems logical. If I switch to two buffers though I get a steady framerate at the screen refresh-rate