Gap for resistor and non resistor plugs:

I found this information on the forum...
'Hello all, I was looking in the Haynes manual and they specify a bigger gap for resistor plugs..They have the gap for non resistor plugs at 0.28-0.32 and the gap for resistor plugs at 0.35-0.39...Am I wrong in assuming that the increased gap would create more resistance..A layman would look at that and think it would be the other way around...There seems to be a lot of controversy with the resistor plugs'

Any thoughts?
Martin