One percent of whose users? That fails to account for the audiences of specific websites. If it's 1% for all browser users, I bet you that tech related websites are seeing much, much larger percentages.
Let's not pretend this is a "early adopter tech people know how to block ads, the masses will surely follow in time" thing. It's not.
You'd find similar massive disconnects if you asked who has a TV, who loves "Transformers" movies, and so on.
I'm not saying every tech people uses it, of course (I don't), but without data I think the existence of a strong correlation between the two is a fair assumption.
AdBlock filters and censors content. Personally, that's why I don't use it. I don't want to see a censored internet, I want to see it as it was intended to be seen. If that means I get pissed with a website doing intrusive advertising and never go back there, then that's a good thing, as it's good feedback for that website. There is more than enough choice on the internet which means I will go to websites that play nice.
Adblock usage has been around 1% for the last few years, so I don't see any sign it'll increase.
</rant>