Hmmm...I don't think the Strat/Squier = Gibson/Epiphone. Epiphone is still in house, whereas Squier is not. I'm not going to find any solid Mahoganey Squires out there. Actually, I'm almost certain that the neck on my SG is a gibson neck, handed down to Epi due to a small defect.
Another thing... A Strat is more of a blues guitar than most Gibsons. The double humbuckers that come in most Gibson's are for a really fat, rich sound. A nicely toned SG can sound down right EVIL. ACDC, Zeppelin (Les Paul)... etc. Not the blues tone that you can get out of a pair of single coils. This is coming from a person who plays almost only blues, and I went with an SG. My last guitar was a Strat.
The biggest issue I've found on most Epi's is the Tunning Pegs. TERRIBLE. Otherwise, good wood.. decent pickups, although they're REALLY worth chaning out if you get serious or play through a quality amp.
edit: Opps, didn't realize that Epi's weren't in-house anymore... my bad.
And I agree, the biggest problem seems to be consitency between them. Some good, some bad.