Assuming you are younger than 35 and starting essentially untrained then if you only gained 10 lbs after several months you weren't eating nearly enough.
I'm 38 and have been weight lifting on and off for around 20 years, but never was very successful at it. I think I maxed around a 225 bench at one point, but now I'm much less than that.
Anyway, I just discovered HIIT training, which has made a world of difference. I'm actually gaining strength and mass every time I work out, and I'm eating less now than I did on SS.
SS works for some people, but I think it depends on your genetics. Or maybe your right and I'm not eating enough. However, my system just can't handle that much food without GI problems. Also, I was getting a big fat belly along with it.
HIIT training has been working for me and after 2 months the gains are still there and better than those I was getting on SS. There also is more evidence that it works than SS has, I believe. Like I posted on another thread, checkout the boise experiment: http://boiseexperiment.com/HeavyDuty/?page_id=308
