I just wanted to chime in, i found this thread from a google search.
Like most of you guys, i notice it on cold days - 40-50-60s, and only after a few hard pulls.
I find if i have been driving the car for a while, and have shifted a bit it doesn't happen. If the car is warm, but the hard shift happens early on the vibration in the pedal will pop up. Once i drive for a bit more, it goes away (feels like the clutch needs to warm up.. but i'm not at all technical so i have no clue if that makes sense)
I've mentioned it to my father who, like most of you guys are finding at a dealership, didn't really belive it, and i can't duplicate it when he's around. Luckily for me, he's the service manager at my Subaru dealership
so if i can get him to feel it, we can get the tech's moving...
I'll keep you guys posted on what we find here in Halifax. I'm "glad" i found this thread and that i'm not the only one.. (glad i foudn the thread, not that others have the issue i guess