I was flying out of USA one night, on board an airline that my daughter used to work for (as "staff" PAX) and noticed ice creeping across the wing as we taxied out. I alerted a Steward to this and one of the Flight Crew came to take a look, with the result that we taxied back for a repeat of the de-ice.
I've since wondered if the crew wee grateful to me for being observant, or if it was a case of "darn - now procedures say we have to go back to get rid of it even though it would have burned off with the friction of the take-off roll".
Last edited by ExSimGuy; 12th Mar 2016 at 14:14.
Reason: edited for the usual typos!