Absolutely. It seems even worse than V1 in this regard. I left my wifi connection up and running with these new drivers for kp50 last night to test, and my battery went from about 80% to zero in three hours. Zap! On the stock drivers, I will have a pretty much horizontal line in Batterygraph during idle time.

Edit: For reference: I never revisited this, but there is a distinct difference between the new and the old driver: The old driver would drain the battery according to my attached graph regardless of whether I had a wlan connection active or not. The new driver will only drain the battery in this way when an active connection is present, but if I disconnect it I will only see normal drain.