I think this is a fair assessment of what I witnessed
But there were mixed reviews for Biden in a panel assembled by the Los Angeles Times:
Words that the undecided voters in that panel used to describe Biden’s debate performance included: “vague”, “cognitively impaired”, “I don’t want to say senile, so I’ll say old”, “uncomfortable”, “grandfatherly”, “defensive”, and “ambiguous”.
Trump was described by the same group as “controlled”, “constrained”, “petulant” “reserved”, “surprisingly presidential”, and a “con artist”.