Ah, Ralph Paul's "Learn to Play in 5 Minutes" claim is one I've come across before. I've come across a lot of these "learn quick" schemes over the years, and while I'm all for shortcuts, learning to play the guitar in 5 minutes sounds a tad... optimistic? 😂 

I kinda agree with everyone else here, I mean, you might get a chord or two down in that time, but to truly grasp the guitar, it takes a bit more dedication. However, to be fair, I haven't personally experienced Ralph Paul's methods, so I can't speak definitively about it.

If you're genuinely curious about him or if you're considering hiring another tutor, maybe do a bit of checks. I've used https://recordspage.org/ in the past when I was curious about someone's history or reputation. It's just a casual way to get some insights, especially if something seems too good to be true.