Yep...Brampton is not building any transit.......all of the sites that have launched and seen no activity in Brampton are on Zum lines.
Zum now is what VIVA in Markham was 5-10 years ago. Yes, Markham was building along the corridor at that stage, but it really wasn't until the Rapidway plans were announced/confirmed/began construction that the boom really started.
I may be confusing coincidence with causality, but that's my interpretation of it.