Yeah. Whether slash or not, one of my favorite relationships in the series is the friendship between Jack and Daniel, and so Jack #2's reaction to Daniel (and especially his conversation with Sam #2 in the ship), made me think of how awful it would be to have somebody who was once your closest friend, and who had shared your best and worst experiences of the last eight years, re-appear without any memories of that friendship, and with no inclination to even like you. Not fun.