As someone has pointed out on another board, BOS had 9 TATL departures yesterday, Monday to DUB, EDI, LIS, LHR, AMS, FCO, ATH, TLV, 763s, 764 (LHR) and 333/339s. That's without any BOS pilot base. So these flight crews must come from ATL or JFK to staff crew these flights. That's another potential issue.