Ya.. dont worry. Even my 700MHz eMac does not have one. as silly as it sound, I think drawing up that OS X window and process bar added a second or two to boot time. Which is not biggy, but OS X boots so fast in the first place. Looks like Apple went away with it.
Oddly, thats how it was in the older systems 🙂 Like system 1 thru 6 I think. System 7 introduced the loading extension icons (miss those) and progress bar, I think....