Infield Fly - ordinary effort

[dweezil24]

On an infield fly ruling, does "ordinary effort" refer to the average player, or the players currently on the field?

In a men's slow-pitch game last night, there was a pop-up between the plate and the pitcher that would normally be caught. The problem is the pitcher is a big slow ball-of-something and the catcher doesn't know his glove from a hole in the ground. Another team's players could have caught the ball no problem, but this one dropped after I called infield fly.

Did I pull the trigger too early, should I have waited to see if it was going to be caught for sure? Or did I call it right and it's their problem if they can't catch? Obviously the offense was upset because their batter was out.

Thanks,