I guess if you're using your laptop heavily while it's charging, it'll take 6 hours like you said. If you just left it alone, or didn't do anything too taxing, it would be much quicker, I'd imagine.
Battery life? Well, depends on what you're doing with it. If all you're doing is surfing the internet, it lasts around 5 hours. If you watch a movie, it lasts a tiny bit longer than 2 hours. This is from multiple reviews on the internet (MacWorld and Anandtech). For comparison purposes, the old system lasted for around 30 minutes longer while watching a movie.
I guess I'm the only one who doesn't think you got a flawed machine. I just don't think you're happy with the specs.
Try repairing permissions. Go to APPLICATIONS > UTILITIES > DISK UTILITY, and click on Repair Permissions. Then shut down, startup your machine again, and see if your sleep issues are still there. If they don't disappear, you may have to reset your PRAM (if the newest Macs still have those).