I can't use them more then 30 minutes also, but not because of weight. Discomfort is caused by tight clamp & uneven weight distribution.
This is the case with my LCD-X, so I wholeheartedly agree with the statement. It would be no issue if people would sit 100% upright like a pole for a perfect distribution, but seldom people do this i.e. feet tucked under their rump, leaning to a side or perhaps from spinal misalignment - which leads to the weight distribution being everything, but subtle and thus very tiring post 20-minutes.
I wonder how Verum does in this aspect. From the looks, they do seem more comfortable - but I doubt any headphone of this size and weight will ever fix this general issue, but a perfect surface tension would alleviate a lot of the issues Audeze phones have (stiff and hefty, makes them move/misalign very fast on your head and thus the weight seems dispersed unevenly). One would expect the clamping force would somewhat distribute more weight by way of large earcups...