As mentioned here several times, Miami-Dade mailed ballots the last possible day allowed by Florida law while most counties were a full week earlier. In following Michael McDonald's early voting site, the same tendency holds up in other states, when you check which counties mailed on what day. Even if you think 2 weeks is plenty of time it simply does not match the return rate of counties that have had the ballots for 3 weeks.
Also, Miami-Dade is 58% Hispanic, the only county in the state that is majority Hispanic. There are 915,000 registered Hispanic voters in Miami-Dade, which is 37% of the state total. For reference, Broward is second highest percentage of the state total, but it plummets all the way down to 11%.
Every cycle when I check the return rate, Miami-Dade lags early. That holds up for primaries also. For a numbers guy he doesn't seem to be aware of any of the numbers I mentioned above, or the simple reality that Hispanics and especially Cubans are not always in a hurry.
I am confident everything will normalize. The contact rate is light years above anything I have experienced previously. I was called and texted every day until my vote was counted. Now I am receiving mailers literally every day from the, "Center for Voter Information" in Tallahassee, urging me to mail my ballot if I have not already done so. In fact, today I received two mailers from them, with the same theme but slightly different. One was my voting record and basically saying don't stain your record by not voting this time.
Contrast to prior cycles when I was totally ignored by Democratic operations. I never heard from Bill Nelson one time after returning to Florida in late 2008.