Msg#: 33616 posted 10:12 pm on Mar 27, 2006 (gmt 0)
Google made an intentional decision not to show all backlinks. They used to show a sampling, but only from pages that were above PR4. Then after a discussion with Matt Cutts (after-hours at a PubCon) Matt liked the idea of showing a backlink sampling that was less fixed and would show some lower PR pages.
I think it's highly unlikely that Google doesn't have the technical capacity to show all backlinks. They are protecting their algo from too precise a reverse-engineering assault -- because their algo is much more link-sensitive than the other two major search engines.