Of course survey data is readily accepted. It is real data. Unless, of course, you don't think statistics is a proper math science. Perhaps the U.S. census and the Nielsen company are doing it wrong.
All data is easily to manipulate. Sales numbers get manipulated all the time by marketers to show them in a favorable light (or show stats that are unfavorable to the competition). Bloggers manipulate numbers to get the numbers they want to spread their evangelism.
To doubt Android has / had market share based on Scooter's ( +MG Siegler
) post is downright shortsighted because he isn't giving you the whole picture (not that should be a shock to anyone), also has manipulated numbers, and shouldn't be trusted because it isn't objective. There's a whole other world besides the three big carriers, so you can't just take that subset and say Apple has the biggest share. But, as +Paul Gardiner
pointed out, this is just noise. Noise meant to keep the Apple / Google war going because people like MG are making gobs of money off it.