The thread "Hot damn. New art is up!" would have been the right place to post it. But even if this were just one of your regular comics instead of one with new art, you could have also posted it in one of your existing threads, like "At least I'm original."
The only time I create a new thread for my own comics is when I'm posting a multi-part saga and it makes sense to keep them all together. Otherwise they go in my old "Just Hangin' Around" thread.
It took me 1 month and 11 days to reach 100 comics. But I don't think speed really matters.
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...Trot and Cap'n Bill were free from anxiety and care. Button-Bright never worried about anything. The Scarecrow, not being able to sleep, looked out of the window and tried to count the stars.