Online pictures showing dwarf mulberries loaded with fruits are impressive. I'd like to try some in the future.
My local wild red mulberries aren't too small, maybe 1" long and if I use a tarp and beat the tree with a stick, it won't take a lot of time to harvest also.
Late winter is dry and windy here but spring is very wet. Since mulberries fruit from the laterals in late April and ripen in early June, too much rain falls can make fruits flavorless and the trees having more fungal diseases. I've seen a few berries popcorn like on the ever bearing mulberry but never on wild rubra. Another killer is the twig blight, which also spreads rapidly in cool and damp climate.