BCG response timing after Casey can vary substantially by office and recruiting cycle. Hearing nothing the next day does not indicate anything by itself.

Some cycles release interview invitations in batches rather than immediately after each candidate completes the assessment.

If the stated recruiting timeline passes without an update, a polite recruiter follow-up is reasonable. Until then, use the waiting period for case preparation rather than trying to infer the result from timing.

next day is way too early to panic.

I wouldn't read anything into day 1. my cycle took over a week.

BCG sends invites in batches sometimes.