Bedrockgames
I post in the voice of Christopher Walken
"What I see locally" is a terrible point (I don't see Americans locally, but I'm pretty sure they exist) or Ford Mustangs (but I'm pretty sure they exist, too). Even "what I see on the blogs I read" is a terrible point, for obvious reasons.
The difficulty accommodating different terms and labels is absolutely a relevant point. I continually add new ones to the OSR category, but you're right - I can never be 100% accurate.
I dont think it is a terrible point. You also have to go by what you see in your own gaming community. It doesnt give you a big picture view, but it sometimes catches things that you miss online. For blogs and forums, keep in mind, i am not saying I see it on a few blogs that i happen to read regularly. I routinely go on forums and skim through threads to see what is being discussed. Regularly look at rpg blogs and google search rpgs to see what is going on. It isn't scientific, but it is done with an aim of getting a sense of what things are on peoples' minds in gaming. In the course of that, i come across a lot of osR material.