No, there was no large increase in demand.. .there were a few idiots who went out after the price was raised and acted like mammals... it was very limited. There was no mass run on the pumps, but there are always a few foolish folks who respond to bright shiny stimuli without much cognitive thought.
1. In certain locales, like Atlanta, I would disagree with you. I think there was a mass run on the pumps. 2nd, there doesn't need to be a mass run on the pumps in order for their to be a massive increase in demand. There can be a massive rise in demand from wholesaler on suppliers, which there was as they all feared supply disruption.