The two selling features of compact fluorescent bulbs are higher efficiency (more light produced per unit energy) and longer lifespan, when compared to incandescent bulbs. We have already established that the first isn’t a concern for people actively heating their homes. My recent experience with the second is also rather negative. I recently replaced as many bulbs in my house as possible with fluorescents. In the month and a half that followed, four of the bulbs failed: those in my kitchen, on my back porch, and in my front hallway.
I have never had incandescent lights fail so quickly. It’s not clear what caused these ones to die so abruptly (A manufacturing defect? Problems with my power supply?), but it will definitely prevent me from buying Sylvania brand bulbs in the future.