Doubt that - good friend of mine who runs Atlantic over at Bridgeport says they charge the $6.00 per gallon for JET A b/c they'll pay it and not care. Its all a justified tax writeoff.
100LL isn't a loss leader - no one makes money on the stuff these days. A jet taking 1500 gallons won't care if its $5 or $6. A piston guy is more sensative to those prices. All the profit is rolled up in servicing hair dryers.