It’s pretty much (>75%?) true, as far as I’m aware. The pore size of surgical masks with respect to the size of virus particles and/or droplets is only of limited relevance here, since the majority of air flow goes around a typically worn mask and inhaled/exhaled air isn’t “filtered” through the mask as such.
But again, this isn’t the point of masks - and that’s been done to death. The point is to catch a large proportion of exhaled/sneezed/coughed droplets from the wearer (which I imagine is more of an collisional/absorption thing than a filtering thing, but I’m not an expert on that). The virus particles don’t need to be filtered out for that to work.