Actually, the 2006 ads for HD Radio were just, "Discover It!", which told consumers nothing, and would have forced consumers to turn to the Internet; Googling, "HD Radio", with these results (also, Amazon.com/hd had a link for hdradio.com):
HD Digital Radio | DISCOVER IT! | HD Digital RadioHow does it work? Find an HD Digital Radio Station · What Products? HD Radio - DISCOVER IT! Get a New HD Radio, Find New HD Radio Stations in Your Area ...
www.hdradio.com/ - 14k - Cached - Similar pages
Stations - by City -
www.hdradio.com/hd_digital_radio_format_list.php
What is it? -
www.hdradio.com/what_is_hd_digital_radio.php
What Products? -
www.hdradio.com/available_products.php
Stations - by State -
www.hdradio.com/stations_on_the_air.php
More results from
www.hdradio.com »
http://www.google.com/search?hl=en&ie=ISO-8859-1&q="hd+radio"
Running Alexaholic, for hdradio.com, results in almost a flat line, for the past year:
http://www.alexaholic.com/hdradio.com
"Sirius, XM, and HD: Consumer interest reality check"
"Finally, note the traffic for HDRadio.com which, although not a destination on the order of Sirius or XM, is the go-to site for further information about HD in many HD radio ads and promotions and is, thus, a good metric to gauge consumer interest... While interest in satellite radio is diminishing, interest in HD shows no signs of a pulse."
http://www.hear2.com/2007/02/sirius_xm_and_h.html
Also, your argument about PS3 and Xbox doesn't hold water, because those spikes in Google Trends map directly to major announcements in the news:
http://www.google.com/trends?q=ps3
http://www.google.com/trends?q=xbox&ctab=0&geo=all&date=all
"Who Uses Google"
"A survey of 1,000 Internet users in the United States by S.G. Cowen & Co. found that the longer people have been using the Internet, the more likely it is that Google will be their search engine of choice. These frequent Google users are more likely than people who use competing search engines to have household incomes above $60,000. Google is also the most popular search engine: 52 percent of respondents chose it as their primary site for general Web searches."
http://www.cio.com/archive/011506/google.html
Most consumers have ISPs, and it is ridiculous to assume that only geeks search on the Internet - 50% of Internet users use Google. So, sorry !