It’s not that big of a stretch.On a weekly basis? You're saying Kansas, Kansas St., Texas Tech, West Virginia had WRs as good as Minney's? Bateman was 3rd team All-American, and he and Johnson were both 1st team All-B1G.
I think that's a stretch.
Those teams you listed (aside from Kansas St and maybe WVU) all had good WRs. Were they all as good as Minnie’s? No.
But after playing OU, OSU, Texas, Baylor, etc. ISU would have seen as good or better WR groups already.