Yes, I must say all that had me confused too. I was assured the velours were the second coming; I tried them, couldn't really hear a difference, or at least not an improvement, and was told my hearing was low fi. Then suddenly everyone was listening to the pleathers again, and modding them, and modding them again, and experimenting with different numbers of holes (no one seemed to know quite the right number or exact placement)--I guess by then the velours had been stuffed in everyone's bottom drawer. I'm still confused. Meantime I'm still A/Bing the HE-500 (unmodified) with the DT880Pro and still can't make up my mind. How's that for low-fi hearing?
You know, just as an afterthought I really can't be bothered with mods. What usually happens is I undertake them with great expectations (touch of Dickens there), they don't really make enough difference to turn the tide, I decide to sell the headphones in question except by now their resale value is affected by all the mods. I think I'll just put up with what the designer intended me to have and leave it at that.
You may not be able to hear it, however the difference of velours vs pleathers is definitely there and measurable.
Not trying to discredit anything you've said, but maybe you do have 'low-fi' hearing. I feel like I can tell the difference between the pads. I can't stand pleather so I can't say anything regarding the jergmods.