And an LRT that takes 45 mins to get from Morningside to Don Mills is?
Come on, that same distance on the 401 takes what, 10 minutes in free flowing traffic? If that?
And technology doesn't determine speed, operating environment and stop spacing does. In identical circumstances, an articulated bus can travel just as fast as an LRT vehicle can.
EDIT: Overall, I think this myth that any kind of rapid transit on Sheppard is going to somehow relieve the 401 is complete BS. They're serving two completely different markets. The only true competitors to the 401 are either Regional Express Rail (Electrified All-Day GO), or Express BRT (probably using the Finch Hydro Corridor).
Anything else will be significantly slower, and thus won't do much to relieve the 401.