According to the MB-USA revue posted elsewhere they considered it to be a possible cross-country bike and Rory Hitchen, Nick Craig etc., when they rode for DBR, used them as such - but not for racing though. At the time it was probably the novelty of full suspension that encouraged this. It is a bit 'sluggish' going up (an understatement!) but I probably had the saddle to high for descending which made the handling a bit twitchy. It also has a very high bottom bracket which doesn't help. I'm not a very good descender on rough rocky trails - give me a smooth long descent I'm fine - so all this added together didn't make for a good experience!
As Lance says, it's the rider not the bike!
I've put 7-8 bars in the rear shock which is as much as I could get in, even with a track pump. The brochures seem to say that up to 15 bar is possible but you'd need a very good pump - and strong arms - to get that in in my opinion. The fronts have about 75psi. Any more and I think they're to stiff.
I wouldn't have said it was to bouncy at all. In fact, I might have had it to hard. I've no experience of FS bikes and had probably set it up completely wrong.