A WebmasterWorld thread notes that if you do a site command search using SITE: versus using site:, Google will return different results.
For example, lets compare site command results for the Search Engine Roundtable.
- site:www.seroundtable.com returns about 7,990 results.
- SITE:www.seroundtable.com returns about 148 results.
In the lowecase version, you see:

In the uppercase version, you see:

Notice how Google is finding results for the phrase "SITE:www.seroundtable.com" in our uppercase version. In contrast, in our lowercase version, Google is returning the number of pages they found indexed.
Why is there a difference? I am not sure.
Forum discussion at WebmasterWorld.
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rustybrick in Google Optimization at June 8, 2007 7:48 AM
Comments (3)

Comments
Same for all google commands
http://www.google.com/search?hl=en&q=LINK%3Awww.seroundtable.com
Posted by gabs at June 8, 2007 08:05