Hi, Dave... pretty interesting. From Google.es HWI don't appear at all in the first page, whether you write Hayley Westenra with or without capital letters.
If I go to Google.co.uk but keep the language as Spanish, HWI websita appears as sixth however you write your search. Interestingly, if I change the language to English and search in Google.co.uk, it appears 5th when I search with capiital letters and 7th without capital letters.
In Google.pl our website doesn't appear either the language is set to Spanish or Polish, however I found something very interesting. I think I'll definately put that information in the the proper threads.