Just one random video I picked from YouTube, there is quite few others all show a very similar technique. It makes a very strong repair probably stronger than the surrounding areas. Most pro repair shop use this technique or one very similar.That's a really interesting video. I've never used epoxy that sets that slowly. The method he uses solved the problem of trying to wrap pre wet-out cloth around stuff.
With regards to repairing fully snapped tubes of a decent diameter, I know from RC experience that it's a lot stronger if you do a repairs inside and out. What I tend to do is treat a thicker part of what would be the pole with mould release wax and lay some wraps of carbon cloth around it. Then if you cut a slit in this you can take it off. As it was from the larger diameter you can can fold it to the inside of the break because of the slit and glue in place then do a repair on the the outside as per that video. Then you've got strengthening inside and out. Although that looked like pretty beefy cloth so I guess it's would be plenty strong enough for the application of a pole repair.