Then again, I could be wrong. I really have or wasn't concerned with it's length. I figured if I get to 75 Hubbers, I might be forced to go to a secondary Hub.
It is completely dependant on whether or not, I feel comfortable with it's length. However, I have some pretty long Hubs, for which, I have written a lot of text, that for some would take at least a good 20-40 minutes to read the entire hub.
So, I guess I am not the greatest word counter and don't use anything to count my words, because most of the time I write hubs free-thought process. Which means, I carry the thought throughout the entire Hub, as I write.
I don't use a spell-checker, which I should, but I mostly trust my hands and mind, to do most of the work. 