That's a risk you have to take. Immigrating to a new country is a process and there are no guarantees (no matter what that country might be). What I know for sure is that if you don't try, you'll never get the French citizenship. I personally have met few Americans who are willing to become French citizens (for a variety of financial and cultural reasons). Yes, I have met plenty of Francophiles but, even among those people, few would really consider taking it to the next level. So you may have a hard time finding Americans who have gone through this process. Consider that in 2003, less than 7,000 people out of the roughly $140,000 who became naturalized French citizens came from North and South America. The vast majority of immigrants came from poor, mostly African, countries. Out of roughly 3.5 million immigrants living in France, Americans have a contingent of only 31,000 (less than 1% of the total). Based on that number, it is possible that as few as 1,000 Americans become French citizens every year... So you might as well be looking at a needle in a haystack.
