John Madden, Dwayne Hickman ie Dobie of Dobie Gillis--telling my age a bit but I only saw it in reruns. All these in I guess the last 2 weeks. Not that odd, really. People tend to wait til after Christmas. I don't know how they manage it but the statistics bear me out for January.
I can't find confimation for this theory but my guess is the next trigger point is around their birthday--either rounding out their total years by dying a day before, or actually on the date, or within a week or two. I was at a funeral for one of my classmates back in high school and passed by a headstone with the date of birth listed as exactly 100 years before mine. S/he died on their birthday. I did not register the death year, probably to keep some things secret. But I'm always a little leery when my birthday rolls around. In January, gulp.