I don't think that is true. I'm a USCGA Admissions Partner, and I don't remember hearing that in any of our briefs. He should apply EA if he feels that his application is very strong right now. Applicants need to be aware that there are multiple possible outcomes when they apply EA:
- Appointment (possibly conditional based on medical)
- Appointment to Scholars Program (Prep School) (possibly conditional based on medical)
- Rolled into the Regular Applicant Pool
- Denied
Some applicants don't really think about the last option and just assume they will be rolled into the regular applicant pool is they are not accepted in EA, but that is not always true.
Also, an applicant can continue to submit updates to their Admissions Officer until their application is up for review. My daughter updated their AO with important updates (first quarter grades, selected as captain, etc...) about once a month after submitting to emphasize that she was not slacking off during her senior year.