>> the propagation delay as the signal gets to each pin (remember a >> foot is about a nanosecond. [...])
Not really. A foot is about a light-nanosecond, yes, but high-frequency signals in copper travel by skin effect, moving significantly more slowly - somewhere around .6c, I think it is. It's still on the general order of c, mind you; for the purposes of this discussion, c and .5c - even .1c - are much the same. /~\ The ASCII Mouse \ / Ribbon Campaign X Against HTML mo...@rodents-montreal.org / \ Email! 7D C8 61 52 5D E7 2D 39 4E F1 31 3E E8 B3 27 4B