My brother decided he was going to get the 1000 wins with each race portrait, and this video shows the strategy he has developed for doing so with Terran. When he sent me these replays he said he was up to 100 wins and he had just started doing this a few hours ago! Check it out! http://www.youtube.com/watch?v=gext6FBWMCk
Both sides micro was pretty bad honestly. But none the less everyone trying to get new pictures does this. and all usually down on lower levels from doing it, since it's really easy to defend off
He'd go farther with the 6 rax build. Go standard 15 OC skipping gas and stopping SCV production after the OC, save 750 minerals, drop 5 rax out of view, then mass up ~20 marines and attack while rallying reinforcements. Doubt you will lose too many games below master level if you do this right and avoid dumb stuff like getting supply blocked.