http://hubpages.com/hub/What-People-Think-When-You-Type-in-All-Caps

Woman fired for e-mails in all caps

Quote - Do not type in all caps. Typing in all caps is considered yelling, screaming or at the very least adding emphasis to the word you type. Various studies on the topic reflect that it is more difficult and takes longer to read text that is typed in all caps. And for those who question “What studies?” here is one example for your reading pleasure:

http://www.psych.utoronto.ca/~muter/pmuter1.htm

Searching for words is faster with uppercase characters, but reading of continuous text is slower (Vartabedian, 1971), perhaps because interline masking is greater with uppercase (Nes, 1986). In addition, lowercase enhances reading efficiency because word shape is helpful in word recognition (Rudnicky & Kolers, 1984).

One is free, at their convenience, to review the entire document above which goes into detail about how eyes react to what they have to read based on how the content is presented.

NOTE: It should go without saying, however, since I was chastised for not saying so, this rule certainly doesn’t apply to the vision impaired or to those who are disabled or handicapped and cannot use the shift key. However, since typing in all caps is considered yelling online, it would behoove those who do so because of these reasons to take the time to include a brief note why they are typing in caps so that their emails and intent are not misinterpreted.

Just a few things to consider when you're communicating online.

I'm still waiting for my residual checks for all those NVIATWAS pictures online here!