We all know Celestia and Luna are well over a thousand years old, its been established time and time again. But just how old does your average, run of the mill pony get? It seems that ponies age much more slowly than you'd expect, considering the following:
Granny Smith has been around since the founding of Ponyville. Now, Its also never been established just how old Ponyville is, but considering the Apples have had time to colonize pretty much the entirety of Equestria, it would seem to be longer than an adult lifetime of ~60 years.
Again, using the Apple family as an example, the Apple Family Reunion happens approximately once every 8.5 years (over 100 "moons" or months.) This puts a definite separation between the awakening of the Elements of Harmony (Applejack mentions in Applebuck Season that all of the Apples were in town for the reunion when Twilight met them) and the next Apple Family Reunion (in Season 3) of over 8 years. Applebloom in that time still has not gotten her Cutie Mark and has not grown perceptibly.
Thoughts? Any other examples of weirdly aging ponies?