I don't know about "hoarding", but something is going on.
Look at this website:
EIA - Short-Term Energy Outlook - Real Petroleum Prices
...and download the spreadsheet that compiles all prices for gas and crude over the last 30 years.
Oil prices are down 47.2% from this time last year, but gas is only down 34.6%. So, as a function of oil price, gas is more expensive right now than what it was last year at this time.
The only thing I can assume is taxes, refining, or distribution and marketing prices went up....
However, I don't have hard numbers, but I would be willing to bet that there isn't a 12% difference in refining, taxes, and distribution prices from last year...and...I would also be willing to bet demand is down too, and has been steadily declining over the last couple of years.
Is there a variable I am missing here?