Begining to wish I hadn't raised this....
What I find confusing from the previous posts is that this position is clearly viable for any passenger in any seat pitch. If somebody believes that it is not achievable then they have simply not understood what the brace position actually is?
Perhaps not, no way I can tell. Still they are a couple of fully paid up adults who obviously take it all very seriously (to let such a thing decide their choice of carrier, rightly or wrongly).