I am doing some of my own testing based on Bill's testing.

Shot Tri-X at EI=400. I always shoot at ISO speed unless I have a specific reason not to...
Dektol 1:9 70F 6 min....
Over developed a bit and quite grainy. I LOVE IT....
Seems a bit over developed.
This is actually grainer than Delta 3200.

Now doing the same with 5 min....