There is a 1935 note now being sold on eBay on which the PMG holder says "Exceptional Paper Quality, Great Color" (pardon the U.S. spelling of "colour"). So there is no reason that their holders couldn't say "Trimmed" where applicable.
As mentioned by other posters, PMG could/should note on their holders if there is any unusual scent on the note. This could occur not only with pressed or otherwise "processed" notes, but also if something smelly was dropped on the note or it was stored in a smelly environment (case in point, I have a 1971 $10 note that smells like a new tire, but I don't think it was pressed). I also remember a previous post where someone had their notes in a safety deposit box, and some perfume being stored in a box above his leaked into his SDB and made his notes reek of perfume...
There is enough room on the PMG holder labels to make brief notes of anything out of the ordinary with a note, so if anything feels, looks or smells funny with a note shouldn't PMG note it on the label?