Three of the players on show laboured in the heat slightly in the second period after also starting the game at Gillingham on Saturday and, for Glenn, the fitness they will have gained outweighs a pre-season defeat.
"We were a bit dozy in the first half," reflected Glenn. "We didn't really have the right application as a team but, I've got to be fair, we've got some young players to look at and three of the players played on Saturday.
"So you can't judge the performances. Steffen Iversen, Stephen Carr, Gary Doherty - they are the lads who put in good stints at Gillingham, almost full games, and were always going to be a little bit fatigued.
"Their fitness levels have to be pushed up, so that was one side of the coin for us which worked quite well because Steffen found it quite hard in the second half and Doc. They'll be better for it in a few days time with that fitness level.
"The goals we gave away were sloppy and it's something we've got to work on and it's given us food for thought.
"Sometimes a little kick up the backside in pre-season is good for us."
Glenn reasoned that 'a little kick up the backside' is no bad thing in pre-season after the 3-2 loss to QPR at Loftus Road on Sunday.