Advanced Grants — for established principal investigators — saw the greatest leap in US applications, with the number nearly quintupling from 23 to 114.
So 114 applications for one? It would be important to see the raw numbers because even 10x of 114 is miniscule.
https://nces.ed.gov/programs/digest/d24/tables/dt24_315.20.asp
840k full-time professors at US universities. And Europe would probably get the lower tiers because why would a tenured US professor give up their tenure to move to Europe.
So article cites 114 for one grant. Let's assume 100x that, so 11,400 professors coming over. That's a little over 1% of professors