I think some confusion is arising from the use of the term "coasting". Coasting to me means free wheeling, that is having the engine disengaged from the gearbox and drive (i.e neutral or clutch in). This is generally considered a big no no, as the car is not fully under control.
However, I think some people are taking it to mean simply "no acceleration" or in other words, leaving the car in a gear with the clutch out so that there is "drive" to the wheels, but not putting any pressure on the accelerator pedal.
Personally I don't think either option is a good one. Out of habit I tend to "power" out of a corner.
My general driving technique is how atpbx, Lopez, etc. have described, i.e basically down through the gears under braking, turn in, power out sort of thing.
I do sometimes tend to fully engine brake at higher speeds by switching out of overdrive and sometimes when changing down from 4th to 3rd too, if I'm feeling a bit racy and there's nothing behind me (as engine braking doesn't warn the driver behind that you are braking!), then I brake with both brakes and gears.
I have always done it this way, even in modern cars without OD. I wasn't taught it, It's just what felt right to me but my instructor never minded me doing it and I passed my test doing it.
I probably haven't described it fully, but it sounds like atpbx's post to me.
Mind you, I am one of those people who drive an old car with 60's brake technology and as for brakes vs. clutch costs, I couldn't car less
