I would say quite the opposite about the Tampa to Sarasota area in regard to cycling. I have had excellent times and results in respect to both. Longboat Key and surrounding is an awesome ride. Terra Ceia is amazing.
Look up a group called History Bike Tampa. They do some really cool rides, every other month now. Great way to see and learn some neat stuff about the area as well as a good intro to the bike scene. Downtown Tampa and the Ebor area are VERY bike friendly IME. I also know there are some really good trails a bit more interior. I am sure a few posters will sound off regarding that.