When I do a GOOGLE search for:
laser machining houston
My pr4 portfolio page has been moving up steadily from 19th to 10th place now, durring Jagger, while my client;
www.huntandhunt.com fell completely out of the SERPs. Note; That his Site is a PR4 throughout also.
I and other webmasters have been seeing the same phenomenen starting with the update prior and extending through, and more pronounced with Jagger.
Ken