Legal Custodian said:
According to RealClearPolitics average, Kamala's post-debate bump in polls is at 1.5% right now.
Two weeks leading up to the debate they had Kamala with a 1.1% lead
The ten polls on RCP post-debate she has a 2.6% lead
So that's a 1.5% bump. For reference, in the two weeks following Trump/Biden first debate 4 years ago where Biden was considered the winner, he got a 3.1% point bump and he carried that bump for about 3 weeks until the next debate. After that last debate the polls got a tad bit tighter but still had Biden with a 7% lead going into Election Day.
The first 5 polls right after the debate, Kamala had a 4.2% lead according to the average.
The most recent 5 polls , Kamala has a 1% lead.
So one can assume the initial wave that Kamala got from the debate was very short lived.
In my opinion, the populace watched the debate and were turned off again by Trump being his normal self. But after a week that wore off and people went back to the thinking of "Am I better off now than when I was under a Trump Presidency". Again, that's just my opinion trying to analyze the data.
I guess something changed in the past hour from when I posted the post-debate numbers. I just checked again cause I'm a nerd and now there are 11 post-debate polls but I can't tell which one was added.
Now the numbers are:
Pre-debate: Kamala +1.1%
Post-debate: Kamala +2.2%
First week after debate: Kamala +2.6%
Most recent 5 polls: Kamala 1.6%
Looks like one was added recently but not sure which one.