Ironworker, you are a true pioneer

Good luck with that. Don't use any minis that you really love will you?

Seriously though, I've never really used anything other than the layering method, although if I'm honest, this involves quite a lot of dry or semi-dry brushing of the base colours, over which I then build up the subsequent highlight shades.
There's no doubt about it, I need to get through my lead mountain faster - but once you know you can paint figures to a given standard, it's tough to go back to painting them to anything less than the best you possibly can, just for the sake of speed...

At the end of the day, I guess I'm resigned to painting fewer miniatures and try to get them as good as I can, rather than the large numbers I'd really like (and need) to paint, to complete all the many projects I have sitting on shelves...
So, good luck with your experiment. If you hit on a method which gives good result without sacrificing too much quality, I might just give it a go.