Peat Moss and Acidity
There have been several postings about Peat Moss being "very acidic", and much of the information being posted is by people regurgitating bad information on the Internet - it is clear they are doing that because they often use the same wording.
Peat Moss is somewhat acidic if you test it right out of the bag, but the acidity comes from tannic and humic acids, which are weak acids that easily bind with other items in the soil. While all organic material will go through an acidic phase while decomposing, it does not mean that they are long-term contributors to overall soil acidity.
Look at two groups of people that attempt to use peat moss for generating acidity and you'll see it doesn't work. Blueberry growers find that they must resort to Sulfur to generate a measurable drop in pH, and large-scale aquarium owners that want to imitate the conditions of tropical rivers (I'm one of them) find it doesn't work to generate acidity.
Just like the "pine needles are acidic" old-wives-tale, this is an "everyone knows" item that doesn't hold up in the real world and real testing. The folks that google stuff instead of writing about real testing that they have done do a disservice to others by repeating incorrect information. Often they are repeating the "professional writers" that write about soil one day, and restaurants the next day - with predictable results.
Bottom line, peat moss will not create measurable acidity when used in typical/reasonable quantities in the real world.