Hi Bookworm
Indeedy it shows that trust decreases with airspeed. But how about the assertion that you stop accelerating.
If I just may take you back to your AvWeb quote (interesting reading)
http://www.avweb.com/news/airman/182410-1.html
in figure 6 Thrust vs drag you can see that the Thrust vector is greater than the drag vector until 69 KTS so until that point for this particular mount (a C172) the resulting factor will be acceleration.
You will agree that at 69 KTS a 172 will be flying.
Over to you.
FD