That is because op didn't run it in Emacs. Guile-emacs uses the same Emacs c functions that Emacs elisp does, and running the Emacs tests against guiles elisp-w

That is because op didn't run it in Emacs. Guile-emacs uses the same Emacs c functions that Emacs elisp does, and running the Emacs tests against guiles elisp-without Emacs is like taking away a huge part of the standard functionality and expecting things to run. The points it makes about speed are not wrong, but that the author fails to understand even the most basic relations between Guile-emacs and guile-elisp makes it hard for me to take it seriously.