I agree, they have been generally accurate, but most of the time they tend to sensationalize and exagerate their stories pretty intensely.
The pictures do help to corraborate the story and while I do believe it is true, I just find it odd that it hadn't been picked up anywhere else. (though reports are starting to surface from other sources)
Lags between the time something is in the Chinese or other asian media about China, such as this riot, are common, almost the rule.
This story is out in english today, but I've seen longer lags of 2 - 3 days since an article in Epoch Times, or Apple Daily or Sing Tao or the Sun etc...have published an article.
Sometimes the US media never publish the story, or don't mention it until a long time later in a feature article on a topic.
US media have no clue as to what's happening in China. They aren't allowed to and they don't want to make the Chicoms mad because they'll lose access they want to boring officials or even get kicked out of the country.
This event was too big for the ChiComs to hide and the MSM to ignore.
But you'll seldom get immediate attention from the MSM because, first and foremost, they would have no clue it even happened.
The anti-Japanese riots were interesting in how they were propigated so quickly and broadly. That's because they were orchestrated and they were meant to be disseminated by the Chicoms.