Delay...but how long?

[bob jenkins]

I'd add to Garth's comment by stating that the "really close calls" should actually be mad (stated / verbalized / demonstrated) a little faster than the "fairly close calls."

On a "fairly close call" it's:

1) See the play
2) Decide
3) Wait 1.25 seconds (to use Peter's number)
4) Make the call.

On a "really close call" it's:
1) See the play
2) Decide
3) Wait 1 second
4) Make the call.

The spectators won't notice the small difference, but they will notice that it seems more "assured".