I'm starting to see evidence they are not accepting it. I fly a lot too (although much less since patdowns and AITs were implemented). A colleague (who works on risk issues for DHS) and I both independently noticed that at certain airports (PIT, LAX, etc), where you largely can self-choose how you are screened, the lines for the WMTD are much longer than the lines for WBI. Several times, I have seen TSOs try to divert people to the WBI lines to even out the flow. We interpret this as a revealed preference for WMTD and against WBI.