That sounds high, at least for my area of the country. I got two quotes: one from a sort of specialized P-car shop (
Kraftwerks Performance - Independent Porsche Specialists) who have done the 3 day training class at Flat 6 Innovations, the other from an indie that I've used once or twice and have been happy with. Both were in the neighborhood of $1700-1800, but that was TOTAL, not just labor.
A caveat: these were roughly a year ago---they may well have gone up some in the meantime.