Did the achievement glitch on your account? Yes.
Did you start out on SuperSoldier Difficulty? No (easy).
Did the Veteran 3/7 achievement unlock? Yes.
Did you access the tutorial from a new game or through the menu? New game on easy.
Prior to campaign completion, did you replay missions through mission select? No.
If it didn't unlock initially, how did you finally get it to pop? I haven't yet - need to wipe my save and try again.
Did you press the X button to skip cutscenes either at the end of a chapter or during a mission briefing? On my initial playthrough, no. On my second (SS) playthrough, yes, I skipped a significant number of them.
Last edited by Triblade; 09-15-2013 at 03:28 PM.
Reason: Bolded the answers to make them easier to read