From a thread on Facebook:
Ideas come to you in all sizes. If it's short, write a short post. If it's long write a longer one. It's a ridiculous discussion, we've had it the other way on Twitter where people argue it's good to force everything through a 140-char pipe. But -- well I don't want to rehash that whole thing. It's just plain silly.
This is similar to an early anthem of blogging -- Dogma 2000.