The thing that sort of pisses me off about this too, is that Slava is a proponent of Common Lisp (weblocks, cl-cont, various essays). Plus, there's no reason that Common Lisp couldn't be used for a high end database product--AllegroGraph is written in Lisp.
The bigger question is, even though these guys are selling a software package that's probably never going open-source, how long until we use compiled high-level-languages instead of C, just like C replaced assembler?