When you're creating a comic, how many panels do you consider the "default"?

I have no idea where I picked up the habit to script for 12-panel pages. Not that the average page has twelve panels, but that my descriptions and space allocations are based on "these two panels are double-sized and this is quad-sized, so there are 7 panels on this page". Still, as I try to find examples, I find more comics based on the Watchmen scheme than anything else (3 rows of 3, even though this makes none of them square), while more and more modern comics even seem to find that an excessive number of panels.

Am I overthinking this? Is it perfectly fine to write a script where a page has anywhere from 1 to 12 panels in it, or is that a taboo at this point?