if you're wondering if you're on track to unlocking the vendors for the crimson lasther, hyjal bear cub, and searing scorchling, you should currently have 53 marks and be on phase 2 of the storyline. that is, only if you started doing the dailies on the day of release and have been consistently completing all of them each day (and if you didn't complete any extra during the daily bug on the first few nights after patch release).
if my calculations are correct, players who fall into the above category will reach phase 2.5 (turn in 150 marks to either the druids of the talon or the shadow wardens) in approximately one week. those who are behind will obviously take more than one week.
after phase 2 and 2.5, i'm not as confident about the number of marks awarded per day. it was heavily bugged on the PTR when i was doing them, and they changed a few of the dailies while i was mid-way through. i'll update my post accordingly as soon as i advance into phase 3.
i'm eager to get the two new pets! curse having to wait for resets. :P