That's a good point, about half the results go away when you add "processor" to the query. Interestingly, the same happens for the AMD query so the ratio is still similar.

That number is literally the most meaningful number there. Meltdown caused more scare than all of these 400 bugs described here, just because intel is not expected to have any sort of vulnerability and the people who really care about security chooses intel(not talking about self described privacy pundits on HN, but military and banks). There had been much more research on intel security than all other chips combined.