First of all, I'd like to thank Frogboy for doing the actual number crunching on this. I think this is worth a thread of discussion all on it's own.

Certain... "experts" have recently asserted that Blue and Black are naturally dominant in Legacy because they have the most broken cards printed over a period of years. Certainly, looking at the banned list, this is true. However, as Spatula pointed out, the difference between Vintage and Legacy is that, well, you can't play those cards. At all. Not as one ofs. You cannot play them on a train. You cannot play them in the rain. So does the theory hold up to inspection? Here's some numbers from six recent, large size Legacy tournaments, four American and two German:

White cards in the top 8- 365 (16%)
Blue cards in the top 8- 569 (24%)
Black cards in the top 8- 332 (14%)
Red cards in the top 8- 650 (28%)
Green cards in the top 8- 503 (22%)

(For Comparison, GP Columbus)

White cards in the top 8- 29 (7%)
Blue cards in the top 8- 135 (33%)
Black cards in the top 8- 161 (39%)
Red cards in the top 8- 63 (15%)
Green cards in the top 8- 35 (8%)

Blue stands up fairly well; many decks used cantrip base to draw reliably into the cards they won with, and used counters to stall, but few decks actually used Blue for their kill beyond Meddling Mage. Black was the weakest performer. And with the highest number is Red, with almost twice as many cards in six top 8's as Black. Goblins obviously takes a lot of the credit for this, but going over the actual results, what surprised me was how much of it wasn't Goblins. Every deck that took 1st place in a major Legacy tournament this year (before Columbus) had red in it- including Threshold, Zoo, TES, and Belcher. Red was heavily played across every archetype- in Red Death, in Survival, in Life from the Loam.

Burning Wish and Devastating Dreams make a lot of sense in Life from the Loam, red for Anger, B. Wish, and Flametongues makes sense in Survival, and obviously cheap mana is good for storm decks. I guess the thing that surprises me most is the heavy concentration of burn being used. When two of the most common and dangerous threats in the format are Werebear and Nimble Mongoose, you wouldn't expect to see Lightning Bolts, Fire/Ice, Chain Lightning, Lightning Helix, and Magma Jet all over the place; is Goblins just so dominant that it's threats are more important than Threshold? Is the inherent strength of burn, being both an answer and a threat in itself, simply powerful enough to negate not being able to kill a Werebear? Is Lightning Bolt actually more powerful than StP?