Note: I have noticed many threads and posts around and today finally i managed to get screenshots from seroundtable.
Google still clearly states that case don’t have any impact on its result !! You can check it yourself here. !!
“Google searches are NOT case sensitive. All letters, regardless of how you type them, will be understood as lower case. For example, searches for george washington, George Washington, and gEoRgE wAsHiNgToN will all return the same results.”
Check these below results: This is lower case version for keyword “big blue pineapple chair” without quotes.
and See this upper case version !! For keyword “Big Blue Pineapple Chair” without quotes !!
The difference is the cartoonbarry.com vs. extrasformovies.com result !!
I think that was just a testing and once Google found that webmasters have noticed they have changed the testing server.