Only one player remained on the pitch for the whole game - last season's under-19 captain Ronnie Henry - while the others played half a game each.
The first half team romped into a 3-goal lead before the break with a superb strike from Johnnie Jackson and two from Darren Anderton, while the second half X1 encountered a different Stevenage side and added a further goal to the tally through Sergei Rebrov.
Glenn was pleased with a bright show from his squad, missing players that were on World Cup duty plus Steffen Iversen, Les Ferdinand, Ledley King, Anthony Gardner and Mauricio Taricco with slight knocks.
"It was a 45 minute practice match for us - that's how we've played it," reflected Glenn afterwards. "It's one step up from our training and it will be the same at Colchester on Tuesday, 45 minutes maximum for each player.
"I thought it was a good run-out for us, I was pleased with many aspects of the game."
One player who certainly stood out during the first period was new signing Milenko Acimovic, who featured in a withdrawn striking role with Gus Poyet behind Gary Doherty.
He produced several moments of mesmorising skill to dazzle his markers and looks to be one to watch out for in the new campaign.
"Milenko played very well, he's going to be a good asset to the club," added Glenn.
"He reminds me of a young Trevor Brooking, he's very much like that. He's got an eye for a goal and gets in the box - he's going to be a surprise to a lot of people.
"He's got the respect of the people around him and you can see that already in training."
Glenn described the first team's opening pre-season run-out against Stevenage as a 45 minute practice for each player and declared himself happy with what he saw.