I actually never heard of amber tricomes sneaking up on anyone. LoLI'll be scoping her quite often during the week. I don't want a bunch of amber to "sneak up" on me!
From first signs of amber tricomes, it normally takes me 2-3 more weeks to get em ripe. Surely not a quick process IMO
Granted, I shoot for 25%-ish amber, but it's definitely never an overnight thing.