Yes, but Google spam filters are too aggressive. It is worthwhile adding that once in a while I keep running into a message lying in Spam that ought to have been in Inbox.
Due to a recent bad experience of email being mis-categorised, I've taken to checking the gmail spam folder again several times a week, just to be sure :-\
Yup, though for me, I've only seen this happen with two different work google apps/gmail accounts, not my personal account. In one case, it caused a bit of a problem!
