Why do certain people keep whining about people using pvp gear in dungeons and raids? For example I am an Unholy DK, and the bonus for wearing 4 main pvp items(head, chest, etc.) is 250 strength (70+180).
According to EJ calculations, to offset this bonus of 250 strength alone I need exactly 1030 haste rating (the second best stat for UH DKs). Can I ever get so much haste on those 4 pve pieces worn instead of the pvp gear? No. Only epic raid gear can prove better, but until then - 4pc pvp is all the way.
So I think people should keep silent and read up before blaming others for wearing pvp gear in pve environment.
UPD: Hit cap is achieved by trinkets, and for DKs haste is better than expertise even when the latter is not capped.