I recently added AT&T Uverse for internet, but I still have TW internet connected so I can compare. With TW, I can get ping times around 9ms, but with Uverse I'm seeing 45ms. Is there any way to decrease the ping times?
U-verse VDSL ping times will be 10 to 15 ms higher than otherwise due to the interleaving used to increase error correction capabilities.
However, 45 ms vs 9 ms is more than that; traffic could be taking a less than optimum route from your home to the server. You could do tracert's both ways to see what is happening. While it could be the TW just has a more attractive peering arrangement for this connection than AT&T does, if there's an obvious problem you can ask AT&T to look at it.
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