Just because a recruit is on campus and taking summer classes, it doesn't mean the player is fully qualified for athletic participation.
It usually means that the kid is enrolled at SJU. Most players don't start their freshman coursework, which is what the summer session is, before being qualified, or am I missing something?? You have to be enrolled at SJU to start coursework. How many times have you seen an elite recruit enrolled and then not qualify?
Technically pmg is correct. Because schools admitting a kid does not necessarily mean the NCAA has cleared the kid. Schools can admit anyone they want for any reason. Their admissions policy has nothing to do with the NCAA clearing the kid to play athletics.
However it still would be a good sign. Not sure if it applies to summer school but remember if you enroll a kid prior to having the NCAA clearing that player then under BE rules you have committed yourself to that kid. Meaning if the NCAA comes back and denies him clearance then not only is he immediately ineligible to play under BE rules but he now can no longer ever play for you or any other BE school period.
See Michael Glover for SHU. Glover's problem was not merely that he failed to get therough the NCAA Eligiblity Center, it was that he enrolled at SHU while he awaited both his clearance and appeal. So even when Glover went JUCO he could no longer go back to SHU or any other BE school. Same with Darnel Dodson of Pitt. He wanted to go back to Pitt but under BE rules because he had enrolled in 2007 and then left in October after he was denied clearance and went to a JUCO in Miami he was not allowed to go back to Pitt or any BE school. Ended up at Memphis.
Bottom line is though while not definitive having them on campus taking classes would be a very good sign.