If by “twee” you mean American TV comedy is/was cloying,
terrified of sex, politically correct, poorly written, and (with few exceptions) derivative and unfunny, then, yep.
It was that horrible idea that there had to be a message. Griffith, Father Knows Best etc.
Give me Bilko trying to get a monkey enlisted in the army anyday.
It’s funny but that situation has been reversed, in the 1970s US comedy shows were sickly, cloying, unfunny, twee rubbish, while British comedy was sharp, witty, intelligent and cutting edge.
I would go as far as to say that you could actually apply that to US TV in general compared to British TV.
Now however that situation has been largely reversed, now US comedy and TV in general is much funnier, better written, more intelligent and more challenging than UK TV, which is now tiresome, flat, PC-obsessed and predictable.
I do realise that given the politics and themes of many US TV series today many here in FR wouldn’t like them but give me Larry Sanders or Breaking Bad any day before any of the pap (Downton Abbey?) produced by the UK.