To be honest, he's only been quick to defend the issue with the wood veneer and the fact that HiFiMan is making a lot of changes since the original public announcement... Everything else he's agreed with (bass issue which he found, treble issue if I'm not mistaken, wood scratching issue, etc.). He's been the one that has pointed many of the issues out and had HiFiMan fix them.
There is a definite roll in the type of wood used that affects grain patterns, thickness, etc.
On the other hand, I can flip this about you as well... Ever since you heard about the delays in the product because they wanted to fix issues with the headphones, you've been mad, cold, and upset (possibly due to impatience)... I have a feeling that's driving you to say half of these things equally since they are fueled by emotion (anger, maybe a little resentment, maybe you want some payback because you were a little impatient? IDK). You make the statement that he's quick to defend, I'm going to make the statement that you're quick to offend.
I won't deny you do make a good claim here regarding wood thickness, but the type and quality of wood used makes a huge difference as well.