Isn't some skepticism of polls warranted, especially these early ones?
Nope. The correct analysis is change from a given pollster. If they hold methodology constant, it measures all that matters — change in attitude.
Unlike previous years concern about oversampling was at the forefront, but GOP and Dems are now fringe parties. Independents 46%. So if the methodology and sample parameters (like age, gender, etc) are held constant, you get a legitimate measure of attitude change.
Because it is independents, there is not going to be much of that.