It's possible and even likely that Google did react -- it is enough for people to google "schnitzler's syndrome" and click the link to rarediseases.org -- as google does track which result people choose, and rank it higher for the future (for different searches as well).

It's also likely that "hives elevated IgM" is the right search in retrospect; Before diagnosis, the search would likely have been more along the lines of "hives weight loss elevated leukocyte elevated IgM fever rashes at night" which likely didn't point as easily to schnitzler's syndrome (or maybe it did, I don't know).

The info was distilled and purified for this article. It likely wasn't that well presented to start with - in my experience, that's the case for many rare diseases: once you know what it is, it is clear that in retrospect you should have seen it all along. But that's just 20/20 hindsight.