It doesn't help a lot. Whether you have a .com, a .info, a .be or a .tk it gets you listed as soon as Google spots the link. Of course Google will give more weight to websites that carry .com. I've seen many .info sites being on top for keywords in Google, but I've also seen many more .com sites being on top for keywords in Google.
The tld definitely counts, but it's normal that for example Google.be gives more weight to .be domains, while Google.cz gives more weight to .cz domains and much less to .be because most of the .be's are Dutch which people from .cz don't understand