I think pushing boundaries at this age is normal and also, they are starting to form their own thoughts about stuff and clashes happen. My 6yos tone of voice leaves a lot to be desired most days and he can be rude. Demanding, rather than asking nicely for example. I think an all day punishment is too much though. I think consistency is important (although exhausting). For example, if my 6yo demands, rather than asks nicely I'll say 'I'm not doing anything for you if you speak to me that way, what's a better way of asking me to do xyz?' And give him a chance to correct themselves, rather than tell him off straight away. If he's really not nice (shouting at me for example), I might temporarily take away TV or something else until these calm down and talk nicely or if he's really worked up, I'll tell him to go and have a lie down in his bedroom and come back down when he can speak nicely (I always leave the time limit up to him).
The reason I don't think all day punishments are great, is because it doesn't allow for a quick 'make up and move on'. So if my 6yo shouts at me and I turn the TV off in response. If 10 minutes later he apologises (sincerely) then I think it's good to accept the apology, remind why that behaviour isn't nice and move on.
Another thing I do, is remind myself to praise positive behaviour. So if my 6yo asks nicely for something, I'll say 'thank you for asking nicely' etc...
From talking to other mums, what you're experiencing is quite common. I think it's important to not let poor behaviour go without comment / consequences but I think perhaps all day punishment are not the way to go (imo).
Also, what TV programmes does your daughter watch? I am often shocked at how some kids behave on these shows (especially some to the American ones!). They can be really obnoxious and rude! I then see my 6 yo mirroring some of the behaviours! I've banned a few shows because I've said I don't like how the kids on or talk.