marketing is a big difference. it hasn't been marketed the same way. also you have no idea on actual supply to make that determination, and i'm not sure the "first run" sold out in minutes. I think it kind of grew a little bit and later runs kept selling out quicker as paranoia set in.
but as you state, probably marketing as obtaining "sub2" makes it appeal more to faster runners than a blanket 'improvement' of "4%" for "everyone".