I think you misunderstood my point. Parent's observation may be accurate because of a combination of quality disparity and disparities in raw numbers.

The elite CS programs are relatively large compared to many Podunk States. So it's not just that there's a modest 1:10 or 1:20 or 1:5 or whatever quality ratio, but also that Podunk State graduates 20 or 30 students a year while the elite schools are churning out hundreds. So there's a 1:10 quality ratio but still a 1:100 yield ratio. Or whatever.

Again, inaccurate for the large state flagships, but very believable for the regional comprehensives.

(This isn't idle speculation. My observation is that larger schools tend to get more attention from recruiters, even setting aside quality, and I think this numbers game has something to do with it.)