It's way too early to draw any conclusions from the early vote, but a few states have fairly sizable turnout so far. NJ is one, with about 100k votes cast already. Interestingly, the Dem share of votes cast is exceeding each of the recent prior elections, a good sign for Dems.
This massive gap between RV and LV is real and we are seeing it all over the states, not just nationally.
The recalled vote is expected.
Just so you understand, it is less "Republicans aren't being polled" and more that they ARE, but are telling pollsters they aren't voting.