Nope, it was a 442. Adkins even said it was in his post match interview.
A 442 rarely ever sees two strikers both on the last defender, Guly was still however playing as a striker alongside Lambert.
The 451 of last season that people keep harping on about involved a midfielder (Wotton) sitting and barely moving from in front of the centre backs, with Hammond and Schneiderlin in front.