Tamron 14-150 for m43!!

I am too familiar with the FZ200, but I do remember reading you can't use a shutter speed faster than, I think 1/2000(or was it 1/1600) f2.8 at the tele end. It has to do with shutter isn't able to move that fast at those lengths. Sort of defeats the purpose of having f2.8 at 600mm+ range when trying to freeze motion.