Ok, sorry to add 1 more Vaporfly post, but I was running in the 2:35-2:40 crowd at Indy Monumental and I think, although I could be wrong, that from mile 4 and on everyone that I passed or passed me was wearing Vaporflys.
In my opinion this shoe evens out the competition. Prior to this shoe, maybe someone beat you because their shoe was better. Now, pretty much every runner (at least in the taking running very seriously but still a hobby runner) is wearing the same shoe.
Again I could be wrong and maybe I just didn’t see the non- Vaporfly runners, but way more in the 2:35 to 2:40 range we’re wearing these.