Are we experiencing a n increase in bike theft?

There are murmurs on the local interwebs and r/annarbor that indicate we may be experiencing a recent uptick in bike theft in Ann Arbor. In particular, some folks are saying that they have had their bikes stolen off their porches late at night. Gentle readers, have you heard or experienced anything? Always remember to use something sturdy when you lock your bike, especially if it looks real slick like this one.