chrism - 5:19 pm on Jan 13, 2013 (gmt 0)
I don't think any lies are being told about Chrome/GA data directly affecting SERP's either, but I also agree that 1/3 market share of Chrome would be too small, but for a different reason than cited above (unless I missed it somewhere).
Chrome users will be more likely to fit into certain demographics, just like IE, Firefox, Opera etc users might be more likely to fit into different demographics. You'd be skewing the data based on that fact for sure. If you could collect data from a completely random third of Internet users, the aggregate data would be far more representative in my opinion.