TUF...how big of a rating?

I kinda stopped watching TUF after season 4. But tonight was the first night in a long time I cleared my calendar to watch. I'm sure TUF earned back lost fans like myself and captured a few new ones cuz of Kimbo's draw.

How big of a rating increase you think TUF (or Kimbo) scored for Spike for these demos:

HH?
M18-34?
M25-54?