Well, it would be good to know precisely at what point that equivalency is reached so that we can plan accordingly. Because if Singer doesn't know where this point is reached, how does he know it's reached at all?
Frankly I'm surprised this silly old fraud is still taken seriously by anyone other than the chronically navel-gazing academics, who treat ethics as some sort of parlor logic game founded on premises of fairy dust. He lives to outrage, but he only bores.