I had previously linked some independent survey results performed on IE10 Release Candidate. It’s now been updated for the release version:
For developers and consumers alike, successful W3C and Ecma International web standards are important for making the web better. A comprehensive test suite is an important part of a healthy standard, along with a clear specification and great implementations of the standard. Without thorough tests that assess the normative statements in a specification, a proposed standard is just a document on a website.
Any browser can claim to support some or all of a specification. The test results from a comprehensive test suite are the best way to determine which browsers will render the same markup consistently. Web developers have told us that seeing the test results, chapter-by-chapter, spec-by-spec, enables them to spend their valuable time building rich, interoperable web experiences for their customers.
We developed 19 new test cases and updated 46 test cases in conjunction with development of Internet Explorer 10. The IE Testing Center now offers a total of 7589 test cases. We continue to work closely with these two web standards organizations by submitting these test cases officially within each working group’s official process.
The first table below summarizes the test results by specification with Internet Explorer 10 along with each of the major shipping browsers running on the Windows. The second table at the bottom of this page provides links to each of the test cases we submitted to each appropriate working group to help the web become more interoperable.