I had one and remember hearing the rumor but seeing how run off from snow would pool I never believed it. Still one of the best and most utilitarian cars I ever owned. Beach day, snow day, moving it did it all. Especially with the fold up seats!
Folded the seats up to the sides, moved a full-sized clothes washer and dryer upright in the back, a lot roomier than it looks. (Edit: I luckily was not dumb enough to hose it out.)