Blitzcrank bot can thread grabs through tiny gaps in minions and the like. Amumu bot can sometimes pull this off too, but he's not as good as Blitzcrank otherwise.
Beyond that, intermediate bots are only bad if you don't pull ahead of them because of their gold income. If you're not beating them in lane, you're losing because after about 25 minutes they will be ahead of you by at least a full item, and at this point they all group up and start pushing towers. They're not great at dealing with pushing their lanes hard though, this is one of the best strategies for winning against them as long as you ward. --- http://img191.imageshack.us/img191/4971/synthreal.jpg "I'm the straightest guy on this board. I'm so straight that I watch gay porn." - Smarkil