I will hve to agree with rich. If your on top of some fish and are workin a run correctly placement of the bait, is the key to success. However giving a fish(es) something different to look at will 'usually' produce a strike.

I have fished with those worms alot and have had very little success. However I will say that I have never began a morning with a pink worm tied on... It is always a last ditch effort when all elese fails. Go figure.