Techcruch reports on Comscore’s Instant Messenger marketshare report, focusing on the low number reported for GTalk. However, they appear to be reporting on the usage of the GChat client application only, which would mean that actual GTalk (via GMail) usage would be significantly higher. Google appears to be trying to disrupt the IM market by offering a web-based chat client, and allowing interperation via the Jabber protocol. This (disrupting an established market by trying to change the parameters of that market) is a pretty obvious strategy.
Ignoring the gratuitous (and probably mis-founded) Google bashing, the other interesting thing to come from that report is the significant lead that MSN Messenger has over its rivals.