That forced me to think about what is going on more carefully. For some reason I was thinking 10x wider instead of 10x faster.

And when I look at a switch like the [link|http://www.netgear.com/products/details/FSM726S.php?view=|Netgear FSM726S] Which has 24 100baseT ports, 2 gigabit ports, and two rear stacking ports (also gigabit?), and assume full duplex, and I add it all up (24*100*2)+(2*1000*2)+(2*1000*2), I get 12.8Gb/s which happily matches the value advertised as non-blocking in the spec?