This is a little misleading. A lot of these prospects aren't known for physicality and many of them are Euros. Being tall by itself doesn't make you a force to play against.
For instance, Drew Miller is 6'2, but he's not a tougher physical presence than the much shorter Tootoo. Franzen is 6'3, but has always played like a wuss. Guys like Callahan and Ferraro are barely 6'0 tall, and they play a physical style.