ColourOfSpring - 8:42 am on Mar 23, 2013 (gmt 0)
IMO.."Domain cramming" would have been a better term for when one domain gets more than the top 2 slots..
How about domain spamming? When I see 3 or 4 pages where 90% of the results are from one domain, it seems like an appropriate word. If someone is clicking on page 2, 3 or 4 just to see the same domain, they'll either try another search or give up. The reason they are clicking onto page 2 is that they didn't want to click on the "host crowded" domain - yet they get presented with it again on page 2 (for many searches).