Just inputed my stats on strstd.com, I'm at intermediate in all of them just by following StrongLifts (http://stronglifts.com/) for the past 8 weeks. Highly recommended simple and effective routine.
We definitely started with a different base level of strength if you are intermediate already! Have you been following the 5/2.5 increase strictly?
I recommend the program because its really simple. I haven't tested it against other programs' results but this one seems effective.