1) Total wins.
2) Total desertions. And Average per bg.
3) Total/Average UNEQUAL numbers for Start, During, and Finish. That's when one side has more players than the other.
4) TotalAverage Resilience comparasons.
5) Total/Average gear score comparasons.
6) Class breakdowns. Average of each class per bg, etc.
To my knowledge, the best WE have is the warcraftyrealms website, which only has a TEENY, TINY number of all battles. Err, that is, TO ME, the numbers seem ASTRONOMICALLY too few. And leaves TONS of details out, including 5 of the 6 things I want to know from above.
Here's their SAD stats on ALL BG's (err, except IoC) from warcraftrealms as of 20 NOV 2010.
Alterac Valley 26,748 27,461
Arathi Basin 26,223 14,258
Warsong Gulch 29,719 23,849
Eye of the Storm 7,765 5,360
Strand of the Ancients 1,837 1,596
I have not found how they get their numbers, or how they account for alliance quitting to avoid a horde fest. And why so FEW BG's recorded. OR when they started recording.
It appears that they did not start till perhaps some time in 2009. I found an old post of DEC 2009 where the numbers were in the thousands, instead of the TENS of thousands:
Right now, my battle group Vindication for alliance is doing HORRIBLE, since the pre-cata patch. Even AV which was alliance's primary winning BG, is now a horde fest since patch. And please don't get me started on WG. That's dead for our realm now.
As for warcraftrealms numbers.
If say, a meer 1 million WoW players play BG's every day, and the average total of players in a bg was say 20, that would ALONE be 25,000 BGs per day. (You have to divide by two for horde-vs-alliance you know). But, let's say only 10,000 players play a BG on average per day. That's still 250 BG's per day, TIMES 365 days, and that still WELL into the 75K range of BGs per year. So, I really have to ponder warcraftrealm's numbers. And that said, the stats they have also seem WAY to "GOOD" for alliance.
But who am I to know otherwise.