There has definitely been a substantial increase in the two cities I spend time in (Eugene, OR and Davis, CA). Three years ago I could spend a week in Davis and not see a single bike that wasn't either under my relatives or had been driven to campus. While the numbers are nowhere near the Golden era ('75-85), there are now many more. In Eugene, I usually see more city trucks on the bike paths in November than bikes, but that is clearly changing. It looks as though there has been at least a doubling if not tripling in the number of bikes this fall relative to years past. It may eventually get to the point where I don't know every cyclist by sight.

I must say I disagree with those who say the increase is and will be driven by infrastructure improvements. The culture comes first, infrastructure follows. Davis demonstrated this in reverse. The infrastructure was built there in the '70s (in response to a cultural shift), but in the late '80s through the late naughties the riders disappeared. So, just having lots of infrastructure does not get people out of their cages.