Theoretically, with Subaru's Vehicle Dymamics Control (VDC,) seeing the same two wheels continue to spin with no movement from the other two isn't usual. The traction control will cut power, but the whole point of VDC is to apply brakes as necessary to transfer power, through the open diffs (front and rear,) acting like an electronic LSD.
Originally Posted By: MarkM66
I limited slip makes a huge difference too.
My Vibe is horrible in the snow, as it's a one wheel peal only. The other wheel doesn't give any effort.
Two years ago, when we had tons of snow here in CT, My STI got stuck BAD. I was parked on a decline and wasn't able to back out until a couple of neighbors helped by pushing. This is with THREE LSD's (center fully locked) and...terrible-in-the-snow, ultra-wide AS tires. In this case, all four tires were spinning, but there simply was not any traction.
With narrower tires with more sidewall on smaller wheels, I'm nearly unstoppable in the snow! I have to actively try to lose traction in order to have a little fun. I'll never go another winter without snow tires.