oh no it shifts perfectly at everytime (exceptwhen cold it can take some time to shift for a few min until it warms up but i KNOW thats normal)
and no it doesnt jar me. i just know if u floor it, and let ur foot off then put it back again even slightly it'll do a rev rev kinda thing. but i guess the pedal is sensitive and I have a tendency to take my foot of and put it back on for like a split second