I think it's more jarring in a way because the design for mobile is actually quite nice. If I saw a desktop-like page on my phone with broken scrolling I'd be like 'meh, I'll check it on desktop'. But if I see an otherwise impeccable page that just behaves schizophrenically when I touch it, the knives come out..

Edit: to be specific, I was referring to that fiddling with the wheel also happens to scroll the text.