Those classical dudes will not like you using your thumb. But if it works for you, they can go get screwed.
This certainly works with riffs, such as, You Really Got Me and All Day And All Of The Night. To name but two. Using treble e does make it jump out more.
Without a doubt It a little overboard with the sales pitching lol. I also believe as a society (myself included) many of us have a short attention____wait what was I saying again
LOL - I was taught classically about 40 years ago and I can't do thumb-over - it puts my wrist in an unnatural position (for me).
The minor chord (with root on the low E) will be played with a little bar using your index finger on he high strings. Same thing as the major one. For example: A minor, 5th fret. Thumb: 5th fret, low E string Ring finger (or 3rd finger): 7th fret, D string Index finger: a bar pressing the 5th fret on the G, B and high E strings.
To help with fretting the A string with your thumb, keep your wrist close to the neck. I learned this watching a Jimi video.
I don't even think about it,I think it just happens accidentally.Also I found when doing any type of exercises that stretch fingers its best to do about 5 to 10 min early in the day then 5 to 10 later.The results will come quicker that spending a long period of time on it.I find this to be the case with a lot of practicing.
Sorry just seeing this now,Just measured my thumb and its 6 inches and middle finger is 9 inches.Not quite johnny Holmes thumb but..Lol.