Your right actually. I never use accents on my searches. Google is still able to find the results with or without accents.

I took it a step further and did a quick test using a Google search on both words:

Musica & Música

Musica: Has 233,000,000
Música: Has 235,000,000

Then I used another word, comuniacion & comunicación.

Comunicacion: Has 122,000,000
Comunicación: Has 127,000,000

Now I tried it with the "ñ."

Ninera:1,090,000
Niñera: 1,060,000

So based on this, if we use accents there will be more results, since there are actually people out there who create web sites using accents. Does that sound right? I don't get the deal with the "ñ." There are more results with using "ñ." I wonder why that is?