Being a bit harsh, aren't you chaps?
They've built an oven that is rather small, but no smaller than lots of other refractory ovens available, at least here in OZ, and they've made some compromises to get the thing that small. Lets face it, any oven small enough to rate as a portable oven you can lift out of the trunk to use is not going to be real close to traditional, in any respect.
I'm sure it will do a fine job for the people it is designed for, even if an 11 inch margerita isn't quite as traditional as a 12 inch.
I didn't consider the claims too excessive as far as advertising hyperbole goes.
For instance I would agree that the 16 by 9 1/2 door is well proportioned, because that is what I have, and I wouldn't like it to be any smaller. It'd be a little different with a rectangular opening, but with an arch any smaller you have to be rather dextrous to feed in a roast or a large pizza.
Regarding the height ratio, its my opinion that with that small an oven it's probably pointless trying to get the magic 0.63. And I've always wondered why people are happy for a rectangular opening to be the full 0.63 ratio, across the full width, but get excited when an arch is a touch over. If you measure the dome height at a point in line with the corner of a rectangular opening, its a lot less than in the middle, and thus the ratio in the corners is way higher than 0.63.
As for the temperature required to get a 2 minute pizza, that would surely depend on the heat transfer characteristics of the refractory? Absolute temperatures that are required for a brick oven are probably different for a refractory oven.
I bet if they say it can do a pizza in 2 minutes, it can, and seriously do you really care that its not 60-90 seconds?
In any case, I'm keeping an open mind. FB have done a lot for promoting real pizza, and they have to balance the traditions with the commercial realities. I say good on 'em. If it wasn't for FBs promotion of traditional pizza, my insulated brick pompeii that really can whack out a fast pizza would have been an uninsulated barrel vault. I'm glad I found the site before I started.