I went the 10th and got into the structure faster than ever. No traffic on Ball at the intersection prior to the bridge or the turn to get in. I went all the way right inside the structure and there was only ONE car in front of me. From the street to my parking spot was less than a song on my Spotify. This was around 8:05-8:15, if I remember correctly. After bathroom, security check, the walk, and very small line to get into DCA, I think it was 8:45 when I entered the park (my feet were hurting so I started walking slowly at one point, but without any stops and determination, I'm sure I could've been there by 8:30).
I also hear Pixar Pals is letting people directly into that structure these days too. I think traffic was greatly exaggerated or only that very first weekend.