I tend to agree with you on statistics. They're not always reliable. It just depends on who's compiling the data, and what viewpoint they wish to project (based on their starting bias). That's not why I like some of these charts. It has more to do with "staying on top" of the latest trends. They ARE a good indicator for that, IMHO.
It's surprising how fast times are changing, isn't it? YouTube just had it's 5th birthday -- seems hard to believe how much that one venue has changed people's news and media consumption -- in such a short time. That's why I try to follow. As an example, how many older folks (or non-PC-users) fail to realize the impact Google or Facebook has on culture? My dad is one of these, who thinks the internet, bloggers, twitter, etc. don't make a difference to "real people".