Here's some interesting info:
If nothing else, see the end section where it shows actual knife wounds and lists actual people as victims of knife attacks.
From the middle, they point to this chart:
Look for the Use of the Knife chart.
A cut on the inside of the arm, 1/2 inch down and you're looking at about 30 seconds before you pass out. And that's the longest timeframe.
Eh, anyway, this is more than likely my last post on this subject. If I haven't made my point by now ...