No, it says "...up to three months or more..."
Three months is *nothing* in the publishing world, I'm afraid. It can take a month or two for editors to work through agented fiction. If they've changed their submission guidelines to allow multiple submissions after the three-month mark, then go for it. But chances are you'll be waiting for a reply five to six months later, anyway. Maybe longer.
Be careful which other publishers you submit to, because some of them won't consider multiple submissions. Whether the 'exclusive option' has ended or not, your mms is still with DAW until they say yes or send a rejection. And here's the scary part: editors do talk to each other. If you are not completely up front with your second choice submissions, they could find out anyway.
Rebnatan, had you even considered finding an agent before you submitted directly? If you've already tried, so be it. But if you haven't, you may have just crossed DAW off the list for any future agent submissions. Of course, if they do say yes, you are in an excellent position to find an agent then. With an offer from DAW, you could probably snag nearly any agent you wanted, as long as they liked you and your work.
This is a complicated game, and sometimes it's tricky to plan the next move. Good luck with your submission!