It's very usual to play descending scale forms or anything descending much faster than ascending, because it is easier to pick alternating (hmm.. Can you say like that? Dunno..) when you descend than it is when you are ascending.. Hmm.. My English sucks.. Big time.. But hey.. Hope you got the point.

Lali, has Al Di Meola written something like the rock discipline or so? Must order... Must.. What is it called?