I get the impression that Defy still has some serious quirks to work out with their G5. Which is too bad - as a yank myself, I'd like to root for them to succeed, and keep my money here in the US. But the ONE video they've put out so far (over a month ago) has some very troubling shake going on at several points (as MTheory mentions above). They ignore every question posed to them about that (as well as questions about the 1% post stabilization).
The G5 is open for pre-orders, but based on what? A spec list, a CG render of how it'll look and ONE demo video. Anyone who preorders it at this point is nuts IMHO.
Of course, they keep releasing more videos around the G2... most with it sporting a BMPCC, a camera which isn't even out yet (at least to general public). On what planet does that make sense, if you're trying to also tap into the DSLR crowd with a larger model? Either the G5 isn't performing well, so additional demo footage would only make them look bad - or they need to fire whoever is in charge of marketing, because frankly BeSteady is KILLING THEM as far as marketing communication.