I noticed how thick they are too but at least they are small. The card stock isn't slippery but I find I like that, they feel a little grainy as though they don't have a lot of lamination on them. But they are my favourite Lenormand so there isn't anything I don't like about them.
Even though I did have to alter one of the cards because it had been misprinted. Now in a tarot deck that card would have stuck out like a sore thumb, I glued a small section of paper over the playing card insert to make it look right - 8 Clubs I think it was, I like the playing card inserts in this deck and I do use them, but the card stock is so thick that I have to go looking for this card so it blends in well.