It isn't weird for warrior and fighters to run around with 400+ dex. (at least that's what i gleaned from a convo when 2 fighters were testing)
example (heard in pvp while people were testing

thought yay good moment to share)
Dutchiee has 600 while reon goes with 550 >.>
Maybe these are exceptions but I doubt it, after the merge there was a huge influx of 'high' ranked canta players making more stat points available, Dread gear is rather common too (more often than not 1 in 8 (yes i calculated this when i still walked around in heroic/worship gear, few weeks after merge) has 1 heroic piece (only 1), yeah legendary pieces were more common then heroic)
Bleh, I suppose it's helpfull to know that people run with about twice the dex you thought they did >.< but best advice i can give is to join the aol raid during the Euro daytime (monday-friday) and just ask in raid. People will be bored enough to answer XD
Hope it's at least a bit helpful,
Mardy