Sam, specs while leveling are vastly different than specs at 80. While leveling your gear tends to be crap with little crit/hit/haste/etc, so talents that proc off crits and make use of haste are not very useful. At 80 as your gear improves some talents scale much better with gear than others. While leveling you just want to maximize your most common spells damage without specing into crit based talents, while at 80 you want to maximize how much damage each crit does since you are going to crit a lot more often (especially in raids with massive raid-wide buffs)

Phien - that PW wws shows that lightning bolt makes up 59% of your damage while Lava Burst is only 21%, which is the reason why I use flame tongue glyph over lava burst glyph, recount shows in heroics my LB's still heavily dominate in boss fights. I assume you manually apply shocks/LvB instead of /castrandom it, so you have nearly a perfect rotation and even still LvB is still less than half the damage of lightning bolt.

Still thats crazy DPS, do you flask up for Naxx25? My mage pulled around 4400 on PW last night unflasked but he still has some blues, I think the highest in our raid was a titan warrior in full t7.5 doing around 6k and a DK doing a little bit less.