Hi Rav, I have a C5 New bike with 850 Miles on it, and only now has the shifting gotten better, Seems to me like it is a wear in process, I was having similar issues and still sometimes do, but its a whole lot better now that it was earlier. Also I ordered the toe and Heel shifter from India for $23.00 and That was and is a definite boost, I love it. (They charge you in UK Sterling, the conversion is approx $23.00)
Cheers
Mark