given that there are absolutely no restrictions on who can register .com / .org, and the fact that .com is the default extension that comes to mind for most web surfers, I don't think that choosing .com over .org has any bearing on an organisation's (non)profit status. i'd even bet that many people don't even realise that .com means commercial.
And for the OP, what's the point of asking for links to existing websites? DH didn't have anything to do with how the site looks or what software its running. Or are you comparing load times with nonprofits on other hosts?