Maybe I haven't seen enough chips in my life yet, but every time I see a chip/fet/... with that glossy straight cut edges plastic package it's a fake Chinesium chip I have bought from eBay for some quick testing, otherwise all I get from Farnell, Distrelec, TME etc. have the matte finish rounded corners plastic package.
Waiting for some FETs by ON Semi to come from Farnell, lets see what the package looks on them, maybe it's how ON Semi makes the chip packaging.
Oscar