The title of this thread is completely misleading. If you actually read the article it says that ticket sales are basically selling at a normal pace compared to other events in that venue. The only conclusion is that this card isn't any different from other cards, in either a positive way or a negative way.
The real indicator will be PPV sales. Tickets will always sell and it's not that hard to fill a venue with an established brand like the UFC. PPV, however, has no limit to buys and cannot be "filled up". PPV is also sold at a set price, so it will be interesting to see who will dish out the money to watch this card. I know I won't.