Now i agree that using the wrong glyths and specs is off, but for 25 man normals you don't need perfect setup nor the best professions.
DPS pull there weight, healers do there jobs and tanks don't die and hold aggro. It's a normal mode raid there made to run though without needing to be hard core raiders.
But that is not to say the raiders can run around the raid in tier 7 and expect to do much dmg and make the enrage timer but you can easily make it with your tier 9 set you should have by doing your daily heroic every day or some tier 8 is plenty.
There are things that have been pointed out that individuals in your guild need to work on such as your mage going fire ttw to aoe the adds and anub with living bomb. Then there is only using 2 tanks and correcting there specs and glyths.
Though you made it past the Twins so i gotta say, i find Anub a much easier fight by far than taking them on and dancing around the orbs and you must have enough dmg to down them so i suspect downing Anub will be down more to practise and optimising what you already have.
Note: Your mage love crit, Locks love crit. Make one mage stay Fire TTW to scorch the boss it is a big boost to dps.