Hmm, well I ran the query that is suggested in your wiki, and I don't believe I see anything out of the ordinary?
record_id EventTime system_cpu_utilization sql_cpu_utilization
18218 2013-08-19 13:06:23.710 10 8
18217 2013-08-19 13:05:23.703 11 9
18216 2013-08-19 13:04:23.700 10 8
18215 2013-08-19 13:03:23.697 11 9
18214 2013-08-19 13:02:23.693 9 7
18213 2013-08-19 13:01:23.690 11 7
18212 2013-08-19 13:00:23.687 11 8
18211 2013-08-19 12:59:23.683 9 7
18210 2013-08-19 12:58:23.680 10 7
18209 2013-08-19 12:57:23.677 9 6
18208 2013-08-19 12:56:23.673 11 9
18207 2013-08-19 12:55:23.670 12 10
18206 2013-08-19 12:54:23.667 9 7
18205 2013-08-19 12:53:23.663 11 8
18204 2013-08-19 12:52:23.660 10 8
18203 2013-08-19 12:51:23.657 11 9
18202 2013-08-19 12:50:23.653 11 9
18201 2013-08-19 12:49:23.650 9 7
18200 2013-08-19 12:48:23.647 9 7
18199 2013-08-19 12:47:23.643 11 8
One processor (out of 16) is showing higher usage than the others, which I assume to be the one that SQL is using. Again, I don't know that performance is being affected but this is certainly the first time I am seeing this.