Kellogg's numbers seemed wrong since I know 40+ went to McK and 30+ went to BCG last year FT so I went to the employment report.
There were 633 fulltime MBA's in the class of 2008 (2Y, 1Y, MMM, JD/MBA, MD/MBA). Of those roughly 215 (34%) went into consulting, nad 101 (47%) of those ended up going to M/B/B. Yes I know some of those would be sponsored but there is no rhyme or reason to how different schools report, so some BW numbers probably include sponsors and some dont. Also if you use the % of the class going into consulting then that includes sponsors, so ignoring those people impacts your final results negatively.
Interesting to look at but I can tell you that if you get M/B/B at Kellogg most likely you would do it at Chicago, MIT, Columbia, Wharton...its just where people chasing those jobs tend to end up at different rates.