The topic of "Google Still Showing Different Results Base" on Case Sensitivity has been an issue of wide debate amongst webmasters.
According to Google,"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."
According to some new reports from this forum called Cre8asite Forums, it has been shown that some people are noticing that Google is showing different results based on case sensitivity.
According to Matt Cutts of Google,
"I'm having trouble recreating this example, and I'm wondering whether you happened to hit different data centers when you were doing these two queries. Can you consistently reproduce different results with upper/lowercase? I'd be curious to know."
According to Barry Welford, who is the moderator of the Cre8asite Forums,
"I think it's clearly a real phenomenon, that is reproducible. It's somewhat scary that we can not get any official Google explanation that makes sense. It would imply that no one is really sure why the Google algorithm is doing this."
Forum discussion at Cre8asite Forums.