I don't know if it's a machine writing the notes or if that's what salespeople do when they aren't busy.
I noticed some similar letters several years ago and had a pretty negative response once I figured it out. But these might be enough better I wouldn't notice unless of course I see another one like you did.
https://www.audience.co/did-you-receive-a-fake-handwritten-n...
Most people, yes. A few will definitely notice and care. Faking this stuff is the fast way to get on my shit list, though I realize I'm in a minority here. I am very pro AI in general, but I am extremely anti-deception. If you send me a 'hand-written note' that really wasn't, why would I trust you about anything else?
However the more I think about it, I don't think that I'd be opposed to receive a card that was written with the help of an AI. Surely it's much more thoughtful of someone to input a couple of keywords that they associate with me and then pick the best one from a few generated cards, than a generic card with an even more generic phrase and picture on it.
Feels much less like deception to me and more like assisted writing.
George gets married because of a typo into an AI handwritten letter service he sent to his girlfriend.