You seem to have had a better training winter 2012, both when it comes to mileage and variety. Are you disappointed that it is not enough of an improvement?
You clearly haven't been dong enough bowling this winter.
mgb: Basically, yeah. I was hoping to have somewhat more training this year - perhaps not twice as much as 2010 (which would be unrealistic). I can definitely still crush my training from 2010, since I was out of commission for three months.
acjospe: I'm taking a bowling break for a while.
A 10-15% increase in volume each year is generally accepted as about all you want to do - more than that and you run the risk of just getting more tired, not more fit. Body can only respond to training if you prescribe adequate rest/recovery.