Likely I'm the last one on my block to discover this, but I've been doing 3 passes when I had time, the usual. This morning, I just did WTG and then ATG, skipping the XTG. Fortunately, my face and beard tolerate ATG very well, in fact that's what drew me to straights in the first place. The only way I can get really smooth shaves is ATG, and the multi-blade razors were killing me with bumps and burn. The results of doing WTB/ATG only were just as good as if I'd done all three passes, with a significant savings in time.
Anyone else stumble onto this?