What a garbage article, Go is faster that Erlang and not by a small margin, same for the GC. Erlang has definitely its place in some scenarios but the article reflects it poorly by trying too hard to dismiss Go.
"When you pit Go’s requests per seconds against the likes of Ruby on Rails or Django, Go returns some impressive benchmarks performing 3x better. Go can scale to hundreds of thousands with relative ease, in much the same way that Erlang and Elixir scale to millions."
He's talking about raw performance where Go is much faster than Erlang and still talking about different order of magnitude to diminish Go.