Since you asked about confidence...The short answer is that I'm confident that the folks who predicted the 2022 (and basically every post Dobbs race since then) have a better grasp on the post Dobbs electorate than the folks who have been wrong about 2022 and nearly every election since then. The composites of both RCP and 538 are fairly decent. But the Dem numbers are negatively skewed by the overwhelming amount of phony polls the GOP pushed in 2022 and are pushing now...
On the other hand 3 very positive polls for Harris came out from A level posters yesterday and they didn't really move the needle and were basically ignored.
For example Marist (A+) put out their final pre 2022 at midnight the day before the 2022 elecvtion when most pollsters were predicing a Red Wave, including the Pubs picking up anywhere from 2-5 Senate seats... They basically nailed not only the winners but also the margins of the major Senate and Gov races in 22 prediciting (Fetterman +6, Kelly +3 Warnock tied, forced a runoff, Shapiro +14, Hobbs +1 amd Kemp +8 in GA).
Everyone else massively underestimated the strength of the Dem candidates, as anyone who witnessed DBM's daily posting of trash polls can attest...Yet everyone is looking at the Fox poll and saying it confirms Trump "momentum". Emerson showed Harris +5, up from +2 on their previous poll.so they don't see Trump "momentum".
Pro Harris momentum from both YouGov/Economist and TIPP as well, both A level polls...
And it's not just the best polls, the early voting numbers look very good for Dems as well. Both Philly and Detroit were the key reasons Biden won PA and MI in 2020 and why the Dems dominated those states in 2022 as well. Both normally return a ballots at a % lower than the state as a whole, while still providing a huge number of raw votes. But already both cities are leading their respective states in rate of return for early ballots and are exceeding their 2020 and 2022 numbers.
Spearheaded by Phil and Pitt the Dems are building a massive lead in PA...
None of this is to say Dems have "won". But I wouldn't get sucked in on the Trump "momentum"...