Yeah, I'm curious too as to how it stacks up against MongoDB performance-wise and why I'd want to use one over the other.
Sure they can take the shortcut and just produce some single case and claim 'faster than a.n. other db' and that will probably satisfy the 'my db is faster than your db' brigade.
However, based on the effort that appears to have gone into this product to get it to this stage, they probably wouldn't be happy with that.
More power to them!