Hi Laura,
Very informative article and I learned some new expressions as well.
By the way, love the site! The interactive tests are fabulous and the ability to cherry pick specific grammar explanations and post it to your notebook is really useful. I'm a level B2 and I've already discovered many grammar rules that apparently I didn't quite have down. The support is excellent as well. Wonderful, thank you!
P.S. A vegetarian lover of the French language... me too! Boy is it tricky visiting my friends in France. Oh and I tumbled on to this site because I was searching for online advanced French grammar tests and then I saw your name, the gal from Aboutfrench.com. I think you all are on to something big here. This site is the fast track to becoming an expert on french grammar.