In freya it was possible to do this by editing apps.css in your theme of choice per How to replace wingpanel's "Applications" text with a icon in Freya . So far as I can tell there's no such setting there any more.
This may seem a tiny annoyance but since I swap between osx and eos every day it just plain stabs me in the eyes to have some generic "Applications" text there rather than a lovely elementary logo. Is this setting accessible in a file somewhere or do I have to learn enough to hack on wingpanel to make such a thing happen?
Thanks in advance!