Umm..You have like 2 different things in one question..Are you asking how long you will be waiting in line? Or what time is opens? Because it looks like you melded the 2 questions..
It opens thursday at noon, friday at 6am
If you want to know how long you will be waiting in line, that depends on the specific line you're in (each line goes to a specific registration staff member who could be a veteran and fast, or their first year and very slow), as well as what time you show up. If your there at 6 and at the start of the line, you'll be waiting maybe 10 minutes tops, but if you're there when the lines have hundreds of people in them, you'll be waiting for hours.
The main thing is, do you care if you miss any events on friday? If you have events early in the day you want to attend, then you should get your badge either as early as possible, or on thursday. That's why I get mine on Thursday for every con. It means I NEVER have to miss anything, because I'm not wasting convention time in line trying to get my badge.