Yeah they changed it for '08-'09, completely different valve body, and the TCU uses CAN bus and such.
I've got my '08 tuned, and that helps a little with the shifting, but the biggest difference really is the valve body. I got mine from batgirl on eBay: https://www.ebay.com/usr/batgirl-111?_trksid=p2047675.m3561.l2559
With the modified valve body, shifts have a nice kick. You can't get the paddle shifter to react any faster though, but the shifts at least happen faster when they finally decide to.