I don't think it happens overnight. I researched that topic a lot on my first couple grows and didn't get a straightforward answer, maybe because it's hard to track the progress of a single trichome while it's still on the plant...
Reducing lights on hours will speed up maturation, but it's like knocking off one or two weeks by going 11/13 for all of flower. If you're already 11 weeks deep then it might be too late to make a difference. Not sure of anything that would speed it up noticeably at this point.
The biggest thing that will slow them down is not being in good health. Healthy plants finish faster for sure, unhealthy plants can take forever to ripen or may not finish properly at all. Not that that applies in your case.
If it helps, I do feel like somewhere in the 11-13 weeks range is when most modern hybrids are "good and ripe." I think most folks who cut at 8 or 9 weeks don't know what they're missing...