At one time (not too long ago) programs accounted for about 22 minutes per half hour. Today: Many shows have dropped or severely curtailed opening/theme sequences. Most shows now run the closing credits over the last few minutes of the program. Almost none have separate closing sequences any more. With syndicated reruns, closing sequences on older shows are reduced to unreadable small windows and run overlapping the opening minute or so of the next program which is also in a small window. Most shows contain several on screen network ads/promos, most animated, some with sound. My estimate of pure programming time (no ads or promos of any kind) per half hour now is somewhere around 10 minutes. Are there any actual numbers available?