"Khans Of Tarkir" intro pack round robin
Thirty little wars later...
1st - Jeskai Monks (URW, prowess) - 4 matches, 8 games
2nd - Temur Avalanche (UGR, ferocious) - 3 matches, 10 games
3rd - Sultai Schemers (BUG, delve) - 2 matches, 5 games
4th - Azban Siege (BGW, outlast) - 1 match, 5 games
5th - Mardu Raiders (BRW, raid) - 0 matches, 2 games
Jeskai the clear winner, then. There was only one instance where it completely failed - when I drew nothing but creatures and their prowess abilities were never activated.
Biggest thrashing: Temur beat Sultai 3-0, with scores of 20 to -1, 21 to -14 and 16 to 0.
The Mardu deck just plain sucked.