I consume most of my news via aggregators like HN, so I have no loyalty to any particular news site. I'm not going to pay $30/mo for a subscription when I read maybe 5-10 articles on a site per month, at most. And I'm certainly not going to pay for subscriptions to, say, the 15-20 different news sites that show up with that frequency on aggregators, with headlines I'm likely to click on.
Put another way, let's say I read 10 articles per day, so about 300 per month. Those articles are spread across a lot of different sites, let's say probably 100 of them, ranging from single article from random blogs, up to 7 articles from a larger publication like WaPo or WSJ.
At even 10 cents per article, on average, that's $30/mo, total. I'm comfortable with that. In contrast, with the current "system", if I had to subscribe to even 15 of those medium to large publications, at, say, $15/mo, that's $225/mo, which I'm absolutely not comfortable with. At that point -- assuming there were no ways to bypass paywalls -- I'd simply just do without, and find other free sources covering the same stories.
But still, I don't think micropayments will work, even if the friction is pretty low. There is a surprisingly huge psychological gulf between free and even one cent. Once you ask someone for money, they are going to agonize (even if just a little bit) over whether or not the article they're about to read is actually worth it.