This is a deck that has two was of winning on turn three. On average i would guess it wins on turn five or six which is still pretty fast.
The first way to win on turn three goes like this (life means the life of the opponent)-
1. Mountain, Goblin Guide, attack, life=18
2. Mountain, another Goblin Guide, attack, life=14, then at the end of opponents turn Lightning Bolt, life= 11
3. Mountain, tap all for mana, play Devastating Summons then Goblin Bushwhacker, attack for 16, life= -5
The other way to win on turn three, thanks to Toasty who is another member of MTG Vault, goes like so-
1. Mountain, Goblin Guide, attack, life= 18
2. Island, Kiln Fiend, attack, life= 16
3. Mountain, 2 Lightning Bolts for 6, life= 10, Distortion Strike on Kiln Fiend which by then is an 11/2 unblockable, attack, life= -3
OR
3. Island, Lightning Bolt, Distortion Strike, dispel, ....... , life= 0
I have tested this deck against an Extended version of Boros and it won. I have tested it against Naya allies and it kicks ass. I have tested it against Aggro-Green-Mana-Accel and it is good. The only problem i have had was playing vampires and that is why i added Blazing torch.
COMMENTS AND SUGGESTIONS ARE APPRECIATED
P.S.: What flying creature or thing should i put in my sideboard? I am thinking either Wind Zendikon, Sage owl, Umara raptor, or Jump