Well as for me, I had around 60 hours TT at the start (and end) of the ATPL theory. I did feel like I was the only one below 100 hours but then I like being different.
Moo...
If you've got a good head for numbers and general aircraft knowledge then I really don't think total hours matters much. As long as you can remember that an aircraft with x number of seats and y number of passengers should have z number of fire extinguishers ..... you get the idea.
Incidentally, I passed all first time with Bristol Groundschool so the hour problem couldn't have been that bad!
Hope this helps!