That's exactly my read.

And, it's not just the headline. Consider the following:

>A Yelp spokeswoman says its software helps filter many fakes before most users get to read them.

When combined with the headline, that really makes it sound like two discrete groups: the fake 20% that make it to Yelp, vs. the "many" that are filtered before making it to Yelp.

The difference is so vast that the headline now feels like link-bait.