[bbartlog]

Calling with middle cards like this is only going to work if you can also cause your opponent to fold or call incorrectly some of the time as well. If you are relying only on being able to take down those flops where you really did hit the flop better than opponent, then the math is against you.
Also, if I recognize that I'm up against someone who will try to take advantage of my narrow preflop raising range by stealing on raggedy middle flops, I'll start raising preflop with some of the stronger middle wrap type hands.