There's a third reason. Ford brought in talented management that has a clear idea of what the problems are and how to solve them. Whether it's too late for them given the damage already done is unclear, but Ford has the best chance of the formerly Big 3 to survive. Personally I think both GM and Chrysler are doomed.
GM has eight brands and Chrysler has three. Put them together and you have a company that should reduce itself to two.
From what I've read so far, the critics overwhelmingly like the new Fiesta, and the public seems to like them, too (sales have been very strong since the car started to reach showrooms earlier this month). As such, this means the Fiesta--if Ford does a successful job translating it for the US market--could have a huge hit on its hands in the USA.