Check the following two keywords: java thread Java Thread Should i use two different anchor text in my incoming links to rank higher for both of the queries? I am interested with Google traffic.
I know that language specific characters make a difference, but never noticed (even in the examples you gave) that capital letters would make a difference. If they did it would propably mean you would have to start your sentences with a small letter just to be consistent in your keywords. Upper-case letters are the same as lower-case letters as far as names and stuff is concerned.