I bought a pair of these on SAC in my usual size, medium. Then, immediately after purchasing I checked the size chart and found out that I should have ordered a large (distance from "bottom of the wrist to top of the middle finger" was about 8") doh! So, I tried to cancel my order.
Fortunately (although I was a bit annoyed at the time), the order was not cancelled and it shipped. When the gloves arrived, I tried 'em on and the medium fit just fine. As others have mentioned, it is a bit tight when you're putting the gloves on, but once on they "fit like a glove."
I don't think Backcountry's size chart is 100% accurate for these gloves; just get whatever size you usually wear and it should be okay. Note that I tend to fall between a medium and a large in gloves (as opposed to between a small and a medium).
Couple of other thoughts, the gloves look as cool in person as they do on the web (how many things can you say that about), but there are a couple of spots where the stitching isn't quite perfect and could give after a year or two of wear. Hence, the four stars (otherwise, five).