The Szolnok is not really "shale gas", but the Endrod is. With all the excitement lately over European shale gas, lets not rule out the possibility that Exxon's thinking is "forget the Szolnok, lets go for the Endrod"
Aug 2007 Scotia report, Szukkatas-1 well:
The Endröd tested gas at an unstabilized rate of 1,577 Mcfd at 50 to 100 ppm hydrogen sulfide and 150 Mcfd at similar H2S concentrations from the Szolnok."