I think they are rolling

from previous days they generally release all at once or in 2 big waves (like last friday i think they did a morning and afternoon wave but the rest of the time it has seemed like 1 simultaneous email as opposed to one every 30 minutes)

Did any early submitters get passed in these R and II waves but sent an update letter? Do update letters delay your review date or does it not really impact it?

Update this early?

Does anyone know what app dates R wave hit? like did they go all the way through July into early August or..

You can look at the admit cycle data to see. (Looks like through 7/16 ish)

As someone who submitted their secondary near the end of the first week of July, whose GPA is around the 10th percentile with median MCAT, and still hasn't heard back, I wish Dartmouth would just put me out of my misery.

begging for death is a cannon event in this process

This seems a little extreme...

Im a similar spot (low stats compared to medians, submitted end of first week of July), I am actually taking this as encouragement. They are known for having mission fit mean a lot to them so i wouldnt write yourself off.