There's a number on the left below the name and a time you've been there at the top, but I don't see an actual number for likes/second. You either have to calculate it or count the pics.

They do a straight multiplication so the number doesn't appear to be pulled dynamically from any of the sites. I.E. You can take the total and the time you've been there, do a little division and get the number per second without having to count.

EDIT: Also if you refresh the page near skype, reddit or any of the others and wait 1 second it'll show you the rate before it's modified by the time you've been on the page.