6Speed Kansas

I recently purchased a 2008 Honda S2000 with low mileage - 22k. On my third time driving it - I noticed that a few times going from stop into first that I felt some intermittent jitters in the clutch pedal. Later in the day - I noticed it again at lower RPMs and slower release, but I did not notice it if I had the RPMs higher and was faster off of the pedal. Is this just an S2000 feature - or, is the clutch already showing me some warning signs?