Just installed mine an hour ago, which I picked up Friday, after waiting THREE WEEKS for it (geez!). Since it was just a simple swap, they let me just exchange it, which I appreciated (they just asked for my mileage and VIN) since it was raining, but I was ready to just plug it in and ride the bike that way some other day if needed (would have taken a minute to swap that way).
Bike feels the same, but won't have a chance to hit the mountains until next year (freezing now). Just noticed a longer high idle, which was fine with me. CO numbers are the same as before (5,18,18,21). Feels just as touchy as before, but am used to it. Seems like the same ECU, but as long as the surging is gone, I'll be a happy camper. Take care.