Having slides claiming ownership of exploits is a very long way away from having the exploits themselves. Such a commodity has substantial financial value - if an intruder came upon them they'd be unlikely to publicly announce their existence but not release them.

It's possible such exploits don't exist, are misrepresented or were never in HBGary's possession. Exploits have a shelf life that degrades as other actors are likely to discover the same bug, maybe 6-18 months in general wisdom. But, it is always possible to claim you have a private cache and then buy them if/when they are needed.