Yes they are, but I must caution:
On October 20th, 2018; Trump and Biden both held dueling rallies in Nevada, campaigning for their party's senate candidates.
Trump got large turnout in the the little-known town of Elko, NV. Biden got very small turnout in the big well-known city of Las Vegas, NV.
The Democrats won that Senate race.
Jacky Rosen beat Dean Heller.
Biden, for some reason; isn't a candidate who attracts large crowds;
Perhaps the candidates who are more 'extreme' or 'progressive' in nature, true fighters ---- are the type of people who can get high-turnout at a rally. Biden is not a true fighter or a progressive.
Crowd size, after all, is an imperfect metric to measure a campaign’s vitality. While it can be a revealing indicator, it still lacks the scientific underpinning of polling or the fixed-dollar figures associated with fundraising. Nor does it account for the judgment of elected and influential Democrats across the country.