I've played Starcraft off and on, mostly through the Brood War days, and never super competitively. My friends and I had a standing Friday night game we'd play. We were ok.
My brother-in-law came to stay with us for a while and he had never played Starcraft before but wanted to try it out. So I said, sure, we can 2v2 the computer so you can get a handle on things. We'll play Terran since it's the most like Warcraft. He told me he's played Age of Empires, he knows what RTSs are like. He'll be fine, he wanted to 1v1. I asked him if he was sure because Starcraft was a much faster game than AoE. He said he was sure, it would be fine.
So we played. I played a pretty standard build order, sent out my 10th/11th worker as a scout, found his base, saw he was still on his initial set of workers and building a barracks with one of them. So I built my second base on his expansion spot, got it up to speed, built a couple of barracks, and a couple of machine shops, cranked out some marines, medics, and siege tanks, and to top it off, I build a starport and some drop ships. Loaded up the squad and dropped them behind his mineral line, obliterated his economy, then rolled through his base.