I haven't seen anything on this yet, but I'm sure most of you got your letters the other day. I guess there's an issue with the ECM that needs replacing and re-calibrating.
I don't know about the power, but the fuel economy has certainly gone up for me. I used to average around 22~23; now I'm averaging around 25~26. (after calculating miles / gallons)
After the recall I felt my power was down, but then remembered I swapped back to the stock intercooler for the dealer visit. All back to go now I put it back again.