I was searching around for "bottom bracket drop handling" and founs all kinds of interesting links.
I am beginning to relate what I'm reading to the differences that I'm feeling between my Giant and my LeMond.
But I ran across THIS
There's stuff here I understand, there's stuff here I don't. But even just with what I know, this is really cool
Give it a try. Warning: it's a Java applet if you're at all squeamish about these things.