Revolutions tend to fail rather often. Depending on your idea of what a success is, you could even say that no revolution ever achieved its goals in full - it's kind of hard when most revolutions were spearheaded by multiple groups with conflicting interests in the first place, and this applies to Arab Spring as easily as it does to the French Revolution.
"Revolution" doesn't mean "fight for freedom". Most revolutions were anything but, either in spirit or in execution. It simply means a fight to change the government / leading powers etc. - sometimes that means changing them for a democracy, both most of the time it's simply replacing one dictator for another (or one "democracy" for another "democracy" :P).
If you only include revolutions that declared a fight for freedom, you still have plenty that have a different idea of what freedom is e.g. freedom to do whatever doesn't conflict with others, freedom to comfortable life while someone else pays for your expenses or even freedom to live under a Christian dictatorship.
Even if you agree on what freedom means, the revolution rarely results in even that - the most common tendency is simply to replace the head(s) of the government, without any real change. French revolution was a great example of a reign of terror caused by the rebels "winning". The Hussite wars were about religious freedom, but they resulted in plenty of theocratic regions and caused a lot of damage to innocents. The American Revolution worked out well enough, but they never really had the full fledged bureaucratic structure to overthrow - they just wanted to get rid of their de iure overlords (and the taxes, tariffs and laws they didn't feel were fair, especially given their lack of representation), and there were still plenty of voices calling for a similar government, because this new-fangled freedom thing sounded new and dangerous. And as Monty Harder noted in the other answer, it was really a war of seccession rather than a revolution - there was never a goal of overthrowing the British government, just separating from it. The same is true of many "revolutions", including some that can be considered part of the Arab Spring - for example, the Kurd seccession efforts.
In the end, history is written by the victors. The Russian Bolshevik revolution was hailed as a succesful revolution, and was like that in the history books, but you'd be hard pressed to find any "common people" who profited from it - only the people in charge really changed, and most things just got worse. Sure, they got rid of the Czar, so the revolution succeeded - but it wasn't really a change for the better, so would you call that revolution successful? If so, plenty of the Arab Spring revolutions were "successful" as well, and some are still in progress. It's not like the French Revolution was just people raising and saying "Enough!" - they took up arms, and fought long and hard. Peaceful revolutions do exist, but they're quite rare - and usually build on a situation that's de facto already quite close to what the revolutionists are trying to enforce de iure.