Some time back I made another Hotmail account, set it up just like I do all of the others which back then meant turning on spam filtering which was off by default. I never used it any where and I still got spam. This is a completely unique name too, so it's not like anyone else could had it before me so that the spam I was getting was theirs. But not only did I get spam, at least 90% of it was in the Inbox so I still had to teach it that it was spam. Now you can argue that it was a long time ago and that Hotmail's spam filtering has improved a lot since then. Ok I'll give you that, however....
These days I use Gmail to get my Hotmail emails as well. Gmail only gets what is in the Inbox, nothing else. At least 2-3 times a week I Gmail gets, and filters, spam that was in my Hotmail's Inbox stuff that Hotmail should have filtered on it's own in fact in some cases when I got to that Hotmail account and look there are emails similar to the one that Gmail had to filter that Hotmail did catch and come in before the one that Gmail had to filter. And when I say similar, I mean the From address is close to the same, the Subjects are or close to the exact same, and even the body of the email is either the exact same or close to it.
Yes I will agree that Hotmail's spam filtering has improved greatly over the years. But better than everyone else? I don't think so.
And do an number of the people that I'm seeing here that are saying they get spam in Hotmail and but not where ever else; let's just make it clear, if you talking about the spam that's in the Inbox then ok that's a bad thing but ok fair enough, but if you're talking about or including what is in the Spam folder then that's not fair since the spam filter is doing its job.