I'm certain you're wrong. People like you just irk me with your misinformed arrogance. Here's a thought, join a random pug, dg the first mob, realize you're wrong then leave the group.
Stop playing with 3k dps. A glyph does not make or break a tanks survivability, but it does for tps (3d zerg strat lulz). Stop spreading your terribad tips to other dks, there's enough people playing the class with no idea what to do. It's even worse when they THINK they do.Well, we both have our reasons, I just prefer more defensive capability over an extra frost strike here and there. You're going to put out insane aggro with our without the glyph, it's not like we're in BC where DPS actually has to watch their threat.
Edit: Since I feel like i'm just thread crappin on the thread crapper, i'll throw some random info in.
At the start of every fight, start out with your normal rotation - IT - PS - BS - BS - SS for example, then immediately hit empower rune weapon and follow up your attacks with whatever you're supposed to in order to secure agro, very crucial on fights such as Maly ;o
Pop a potion just seconds before pulling - if it's a resistance fight (sarth 3d / hodir off the top of my head) http://www.wowhead.com/?item=9036, if not then http://www.wowhead.com/?item=40093, to be able to pop a second potion mid battle.
Primary stat to stack is sta or dodge. Never stack parry or defense, until ~800 dodge rating, which is when defense will start pulling ahead point for point in avoidance.