Based on my experiences, current wait time for UL’s Marks Hub is approximately 6 business days (not counting Saturday/Sunday) right now.
A little background–the Mark Hub is part of UL’s new process to streamline the UL logo printing approval process. Everything has been moved online in order to accomplish this. While this turn-around-time doesn’t seem impressive, it’s actually a big jump forward versus the current manual process. Of course this system only works for the new Enhanced UL mark approved. Looking to get an old logo approved this way…sorry you’re out of luck.