Bennett is probably the best example -- had he not known of BU and spent that weekend in Peoria with Westinghouse he'd have never considered BU nor Peoria
...and YOUR OWN original statement was...
" the State Tournament being in Peoria will help Jim Les recruit..."
..and you said ABSOLUTELY NOTHING about narrowing the field further to recruiting and landing only the players who played on the court for a team in March Madness.
So going by YOUR own definition, I would include Prosser as he was there, had friends on the Eureka team, has great memories of the weekend and was definitely influenced by it.
Guys like Fay were already LONG committed and signed before they ever had an inkling their team was going to play at Carver in the State Finals,
so those guys can hardly be considered "failures" since they weren't recruitable at the time they at Carver during Madness.