Mega-rich Rangers are, once again, expected to push for promotion this season but some of their players are wobbling under the weight of expectations at Loftus Road and they did so again in a 1-1 draw.
Rangers fielded a team boasting three Premier League loanees, whereas Peterborough lined up with four players plucked from non-league.
But it was the visitors who at times looked far more capable of challenging at the top end of the table this season.
Posh went ahead through Aaron Mclean but Wayne Routledge's goal ensured Rangers escaped with a point from an unconvincing display.
"Any successful campaign is built around your home form," said Magilton.
"We are stuttering, there's a nervousness about us at times. The opposition have come here and enjoyed it - probably a bit too much.
"I don't know what to put it down to. At times we were hesitant, sloppy and our decision making was poor.
"Our play at times is good but that's not enough, especially at home where expectation levels rise. You've got to be able to handle that and maybe some can't."
At least Flavio Briatore was not present to witness an out-of-sorts showing from his expensively-assembled outfit, the chairman apparently having more pressing matters to deal with on the grand prix circuit.
But Magilton will be in no doubt he needs results, and fast, with the Italian not noted for his patience with under-performing managers.
Rangers fell behind in the 16th minute when debutant Ben Watson, on loan from Wigan, gave the ball away and Tommy Williams' cross was glanced in by Mclean.
Watson atoned for his error with a goal-saving tackle to deny Lee Frecklington, and the hosts hauled themselves level 10 minutes before the break when Arsenal loanee Jay Simpson was put though by Tottenham's Adel Taarabt and cut the ball back for Routledge to tuck away.
But the anticipated second-half onslaught did not materialise and it was Posh who came closest to grabbing a winner when Tommy Rowe missed a good late chance.
And they were denied a first victory of the season when Craig Mackail-Smith was flagged offside as he fired home in stoppage time.
"I'll have to look at that again," said manager Darren Ferguson.
"But I thought we deserved three points over the 90 minutes.
"You always need a bit of luck and we are just not getting it at
"But there is no time to feel sorry for ourselves. As long as we keep putting in performances like that then we will get the wins."