That is very odd, perhaps the Tom's guys decided the microstuttering problem was so signifigant that it's benches didn't deserve to be listed. I guess you can always go back to the q4 2010 charts and cross reference.
I must admit to not looking at the charts for a good long while now. The reason is because for years they have been total rubbish. As i said i don't know about now but after years of asking why cards were listed incorrectly/not listed etc most of us gave up so im not surprised to hear there are cards missing.