Low contrast webpages do appear to be all the rage with newer designers so perhaps I can point out the problem with that with two small anecdotes.
I, like around 1% of the population, am "blue-black" colour blind. Not something that generally affects me in day-to-day life, but the colours I see are darker and less contrasting to what everyone else sees. 1% of the population is not an insignificant proportion of the world. The lack of contrast is such that all the bylines dissappear. Worse, clicked links also dissappear. Yet, because the from-domain text is higher contrast, it remains visible.
As for the comment box/button... Almost felt like it was deleted. Took me a moment to confirm it wasn't hit by a display none.
Second anecdote. Everything except .title has a font-size set relative to the browser, which is good. Optic neuritis makes things noisier for me, so the base font-size of my browser is set a little higher. Which, unfortunately, makes that 24px decleration stick out like a sore thumb. It doesn't scale like everything else.