Damn it, Gooey, I can't help myself from replying!! Lol.
But yes, when someone fights the piss poor opposition that wilder has, it's very possible to rack up an impressive ko ratio.
Look at Frank bruno, for example, won his first 21 fights by ko.
Now, I know 21 isn't 40, but, and this isn't even debatatable, most of bruno's early opposition were far better than wilder's.