I have been monitoring cached page size for many websites since last 6-8 weeks. And i was purposely looking for the large cached page size ,who were more than 200KB. And I was constantly researching on the SERPS of those 200KB+ pages some of them were even 400KB+. And I have seen that almost all of them were coming up for their unique keywords which were on the bottom of the pages, i mean those keywords who were far beyond the limit of 100KB+ and i finally concluded that google is now no more keeping limit on the cached page size.
[edited by: tedster at 1:48 pm (utc) on Nov. 27, 2006]