^
Anyhow, could be a number of things... more likely one of the following as opposed to overly-hyped IMS* issues:
- When was the last time clutch was bled? Should be done at a min every 2yrs w/ brakes but most dealers will skip unless you specifically request.
- Possible Master Cylinder issues?
- Possible bad motor mount?
- Possible clutch going bad. Any slippage in other gears?
- Possible bad clutch work? No offense meant but Porsche clutches have more travel and different pick up points than most other manual cars out there. To that point, from driving various Porsche models, the Boxster clutch is even different than other P-cars IMNSHO.
So, I'd start w/ something cheap like bleeding the brakes and clutch.
Good luck
* Yes, I agree some IMS issues exist and Porsche should stand behind within reason. However, from my experience and subscribing to numerous active forums, it's not nearly to the chicken little "sky is falling" extent some who profit from selling allegedly 'better' aftermkt replacements would lead you to believe.