Will the McRib be Back Permanently?

 "McDonald's Corp. says a key sales figure rose 4.8 percent in November, helped in the U.S. by the popularity of the limited-time McRib sandwich." 
Original Article 

The McRib was available for the month of November and just in that time, McDonald's sales went up by 4.8%. The McRib is always available in some countries, such a Germany, but only appears sometimes in the United States. Sales also grew due to caffeine drinks and value menu items. McDonald's "operates more than 32,000 restaurants in more than 100 countries."