Sunvalley, the humbuckers do split into single coils. In single coil mode it's a bit warmer than a strat pickup, but is missing that fender twang. It's nice, though. Humbuckers really are sharp, especially at higher volume on my Vox. I unfortunately don't get much time though to play it at that kind of volume (thinking about a Killer Ant now to get the tone without having to irritate the wife and kid). I've been working on Crossroads a bit with it with the neck pickup on single coil, and have fun with some AC/DC tunes on the bridge.
My only complaint of the guitar is the balance when playing seated - it's heavy in the body and won't rest balanced on my leg like my strat. So, it's usually played standing. No big, just a nit pick. Now Carvin is making a single cut which probably adds to the heft but may improve the balance.
For those of you interested in Carvin, I'm very pleased with the workmanship, the action, tone, wood and finish choices, etc. A bit of a risk in buying one without playing it first, and the customer service was so-so in the ordering process, but I'm very happy with the product. I feel that the price I paid for it was a great value in a custom shop guitar.