I agree that the bash looks a little over used but even so, the bash plate should of snapped before the frame gave way.
I managed to bash my bashplate into all kinds of shapes on my old t-pro 03, but the bashplate always snapped before the frame suffered any damage.
Judging by the riders comments 6 weeks ago when he first dented the downtube it looks to me like the t-mag's downtube is far too weak.
Those bashplates are made of cheese, i can bend one back with my hands, so for it to force a hole in a relitavly brand new frame is stupid.
Also, it would only take 10 - 15 harsh hits on the back of the bashplate in order to force it into that shape so over 6 weeks it isn't amazingly damaged, especially considering it's been riden on natural where bash is used a lot more. The rubber in the middle is soft so the fact it's squashed really doesn't count for anything and IMO the rear bashplate mounts are far too small. I'm sure if they were like the ones on the t-pro (one continuous flat peice of alu) the bash plate couldn't of been bent so far forward in the first place.
Onza offering a half price replacement is fair enough if they truely believe it's been abused, But IMO if you analyse what has happened and over how many weeks then there is clearly something not quite right with the t-mags downtube.
It'll be interesting to see how many more are broken considering the average level of riders who own an onza, and weather or not this really is a one off.