BURN THE HERETIC!
nah, I agree – I've two bikes, one's a summer FS with derailuers and it's definitly faster and lighter. But summer has been a bit thin on the ground for the last 3 years.
Then I have my winter mud plugger with the alfine – it's not as fast and it's a bit more limited but the reliability is just outstanding, the only thing that needs sorting are the Pace forks (Nipper brokes my glasses just before Xmas so they had to go on the back burner) in a year of riding, Full length outers on BB7's, the chain is a rust free commuter beast and it all trundles along on UST. I do think the ability to change gears without having to peddle is a massive advantage, spesh if you get stuck in the snow say – and I don't think I've ever shifted in any set up under a heavy load except on a demo bike that had flappy shifter things and I got way confuzzled.