I've actually had toxic str geared WARs in DF that can't hold hate these days, any PLDs I've come across are usually really good.

A tip is if you're in a dungeon that doesn't sync your gear and the tank is loosing agro check their gear, if you are around 10 ilvls above then they will be having a hard time keeping stuff off you. You should learn to use quelling or calm down in the aoe spam and don't just keep smacking a monster if you see you're about to take agro. Maybe kindly offer advice (key word being KINDLY) and help newer tanks.

Remember just because there's no bonus at the start doesn't mean the tank has tanked this dungeon before, they might of been dps or a healer.