Yes - I thought that was a mistake about alluminium. Could be that ally is stronger weight for weight - I don't know.Steel frames seem more springy to me. I like that in an unsuspended bike. The other thing to say is that not all steel frames are the same. I remember the difference between an old cromoly road bike and one made out of Reynolds 531. One felt like a bridge, the other like a gazelle. Actually, they were both good strong and effective frames, they just felt different and the 531 was a lot lighter. It had double butted tubes.