Sure looks like an unsubstantiated claim to me.
If Thomson were (as you claim) known for producing undersized stuff, you'd think we'd do worse than 1 sample out of 18.
(not going to count the image you found as the guy took it from another site and I can't find its context)
But it's nice to see that you've moved the goalposts to now include Thomson's metallurgy, machining and pricing policies.
We get it though, you don't like Thomson.