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I see the same often as well. I try to pay more attention to the total time it takes the queries to run. That along with performance of the php code. From what I've noticed it's rare that any of my pages take longer than 0.1 seconds for the server to render.
If you're queries start to climb to high you should check the time, and then turn off a bunch of blocks and check the time again. Should help to see if your queries need to be looked at.