My MIL asked me the same question but at the time I told her I only really had one year's worth of experience under me to really determine whether it was indeed an increase of people riding their bikes. Now I feel more confident that the answer to that question is a resounding YES. I have seen more plains-clothes cyclists on the roads and more people whom I suspect park their cars somewhere to ride their bikes in at least part way on the trail. There are 7 bikes on the bike rack in the parking garage today where before there'd only be the usual 2 or 3. I think people are trying in some way to save some gas and are taking it to the streets instead.