I would say the same.. if there's a couple of feet of water, get the FHM started. I doubt you will kill any FHM by stocking too early. What they need to survive happens pretty fast, what they need to thrive in that first year takes a period of time. Now, one can fertilize and get a bloom fairly quickly but depending on location, you may be fueling a fire by doing so. If done in stages to allow the process to cycle in a timely fashion, I find the outcome is better and more stable.
In esshup's example, that can be very true, but the only wet spot in anything within 150 miles of me, is where you wet your pants so I don't have to worry about existing species such as that, but it's super solid advise in areas where those conditions exist.
