I really like your thinking, Vixte. That there were previous burglaries in PdL is a fact, so the chances of burglars playing a role in what happened actually has a higher probability relative to all other scenarios that have no precedents in that area whatsoever.
It is almost a Bayesian statistic, where the a priori chances of a burglary that night where pretty high, but given that chance it then going terribly wrong was pretty low. On the other hand, if we combine the small window of opportunity (due to the infrequent checking, so a high standard deviation around the 30 minute intervals) for the burglars to make their move, then the probability of being caught in the act could be high again. If for instance MO would have disturbed the burglar and make him (or her) flee into the children's bedroom thereby waking up Maddie, then the silencing could have been fatal (like in QM, poor MO would be the observer that changed reality by the act of observing). A gang of three then could explain some first (panicky) phone traffic around that time and the decision made to get rid of her body. Subsequent spikes in phone traffic would then be explained by calming down and aligning on a concocted alibi and ensuring that the weakest link wouldn't break down.
Yes, that is exactly my theory.. if the three burglars have something to do with Madeleine.
But this doesn't explain the doors being ajar and the open window.
The potential burglar in this case should have been 'IN' before Gerry was in, and after Gerry was IN..
He might have been afraid to exit.. as he had no was of knowing if anyone would enter through the patio doors.
Especially if he for example through the window saw Gerry talking to Jes.
This might be the reason he opened the window.
When MO came in, he was still there.. possibly even holding Madeleine, so she doesn't make any sound.. and this attempt of making Madeleine quiet, like pressing her mouth in panic, might have caused her death.
But as you said, this is only a theory, and only in case the SY is looking at burglars as potential lead.
We are in 2014, I think SY might be using the technology in searching for leads and probabilities.. They surely have a computer software which helps them in this area.. with all statistical graphs, and probabilities of this or that theory being closer to the truth..