Yes, the tank and the driftwood are 2 months old. The growth of this stuff has been ongoing for 3-4 weeks.
DarkCobra, I had seen a few areas where this fuzzy growth was on my plants. Specifically, I saw a dime-sized area on a java fern leaf and I saw some amongst the "planted"/exposed roots of a couple of anubias. It wiped away quite easily, so it is possible that this was just some loose fungus that had settled onto the plants and onto a lava rock; they were small areas. I cannot produce a picture because I cleaned the vast majority of it up today, including off the pictured dw.
Great to hear this may just be a fungus. I just noted some pond snails that must have come in on my plants so maybe they can help. I will look out more for it's presence on plants and take a picture if noted. If this were BBA and it grew on plants, would it "adhere" as strongly to the plants as it currently adheres to the dw?
Thanks, guys