This seems to be what the latest science on learning music also suggests, it's the breaks between the sessions where the learning and improvement take place.
I hope I get to be as good as you guys one day. Being playing for about 2 months, about an hour a day. Can just about pluck a major and minor chord, slowly.
Yes, I have been reading her book, which is scientifically researched and all makes very good sense. She is even generous enough to provide a free PDF with all of her advice from the chapters. On her website