Mage - Summary

Based on a sample of 3,332 level 70 Mages, here is a summary of the stats I've found.
Talent Specs

Arcane	26.86%
Fire	37.15%
Frost	25.45%
Hybrid	10.53%

Average Base Stats¹

Strength	31
Agility	38
Stamina	353
Intellect	400
Spirit	173
Armor	1192

Average Spell Stats¹

Bonus Damage	679
Bonus Healing	592
Hit Rating	53
Crit Chance	16.22%
Penetration	22
Mana Regen	16.25 casting, 144.38 not casting

Most Popular Professions

Tailoring	34.03%
Enchanting	20.11%
Herbalism	16.08%
Alchemy	12.06%
Mining	6.92%
Engineering	5.14%
Jewelcrafting	3.16%
Skinning	2.3%
Leatherworking	0.17%
Blacksmithing	0.03%

Most Popular Combination of Professions

Enchanting & Tailoring	33.52%
Alchemy & Herbalism	15.4%
Herbalism & Tailoring	11.58%
Alchemy & Tailoring	6.58%
Mining & Tailoring	5%

Reputation
WoWWiki has an interesting article detailing Aldor vs. Scryers.

Aldor	35.95%
Scryers	52.43%
Undecided	11.61%

Misc

• 7.35% of Mage's are exalted with Netherwing.

¹ - These stats include the effect of any buffs / aspects enabled on that character. I have not figured out how to extract the 'unbuffed' stats as yet.