[blykins]

Plums, in the above scenario with the advertised/.050" durations far apart, wouldn't the valve be slow to get moving from seat to .050" (AND much slower overall across the whole seat to max lift range compared to a close duration cam), but as soon as you approach the .050" mark, it would take off, right? That's where I was referring to a quick acceleration.

I agree that it would be a slower lift overall, but I think once the valve approaches .050" lift, it would accelerate rapidly.