I just did Pocono International, the FUSA track, on my K1200S this morning and the belly pan rubbed only at one point. At that particular spot on the track there is a sharp left-hander that has a sudden rise just past the apex, when you're still in full lean if you're up to speed. In the brief moment that the front wheel is on the higher surface and the rear is on the lower surface, the actual point of rise contacts the back of the belly pan when in full lean. I have a nice brush-stroke like scrape on the left rear of the pan. I'll try to post a pic, if I get around to it.
For what it's worth though, many other bikes scraped their pans on that spot and nowhere else on the track, including my friend's CBR600RR (which admittedly doesn't have as much clearance as the K-S). Also, I've never scraped the belly pan in any other location on the street or other tracks, despite being in full lean on many rough and uneven surfaces.
Bottom line, I've never heard of anyone else scraping their K-S's bellypan, and though I get pretty aggressive in the corners on my K-S, I'm willing to be that there are those here who put me to shame. I think that it happened to me only because of a freak combination of road surface (track) and the required lean to complete the turn at speed. On the street I may not have been leaned over quite as much as I was on the track and therefore in a "real-life situation" that rise may not have even registered a hit on the bellypan.
I can't say what would have happened if I hadn't removed the centerstand last night.