Not to be an ass, but that thread is from 2008. It's irrelevant when considering 2013 Flow.
I rode the Zombie edition Quattro's for a whole year and didn't have a single issue. I've been riding last years M9 SE's for 2 now and have had no issues. Gnu's are crap. They feel like 4 year old Rides and they have too much canting in the highback.
The new Hybrid strap is great if you are more often in powder situations cause they better allow for traditional entry.
As far as loss of performance with a lack of toe cap, you actually get better performance. Instead of driving into the highback then down into the heelcup then the frame then the board, you drive into the highback, straight into the cable, staight into the base. Skipping a force redirection means more energy goes into the board. They're quicker edge to edge than traditional bindings.