We seem to make judgements or assumptions as we watch consumers adapt to new technology like DVR's...
Frankly I have made some assumptions on what consumers do when TV commercials come on and MarketingCharts had dispelled them...
"The Video Consumer Mapping (VCM) study sponsored by the Council for Research Excellence indicates that TV advertising and program promotions reach 85% of adults daily. Viewers typically see 26 advertising or promotional breaks, at an average of two minutes and 46 seconds per break, accounting for 73 minutes each day."
"According to the study, 11% of viewers change channels during the four minutes of TV programming before the commercial break; only 14% change channels during commercials; and 13% change channels in the four-minute period after programming returns. In other words, 86% of viewers remain with live TV during commercials.A similar pattern emerges with room changes: 19% change rooms in the four minutes before a commercial break; 20% during; and 21% in the four minutes after programming returns."

And what about web/tv simultaneous viewing?...
"More people spent more time simultaneously viewing the internet and TV in December 2009 than in June 2009 or December 2008, according to the Three Screens Report from The Nielsen Company.
However, TV usage appears to be spilling into time spent on the internet, rather than vice versa. Panelists spent an average of 34% of their internet time also watching TV in December 2009, compared to 27.9% in June 2009 and 29.9% in December 2008. On a year-over-year basis, the amount of internet time panelists spent watching TV rose 13.9%.
In contrast, panelists only spent 3.1% of their December 2009 watching TV time also using the internet, compared to 2.7% in June 2009 and 2.4% in December 2008. Despite the much smaller percentages, it is worth noting that the TV-watching time spent also using the internet grew at a much higher annual rate of 29.7%, more than double the growth rate of internet time spent also watching TV."