When was it? A few years ago, they added a new requirement that you don't apply directly to the "prefecture" but you have to go through an additional step which takes about a year.

My gf is applying for citizenship at the moment, I've described the timeline for her situation. It's been now more than 3 years since she started her application, including 14 months waiting for their decision. And she'd been living in France for more than 10 years before that and graduated from a French university.

It probably would have been easier to just get married...

BTW, congratulations for your citizenship. I'm glad it was efficient for you.