Pluralism- expressed via TV scheduling?

BBC1- 10 o'clock news
BBC2- Have i got news for you
ITV- I'm a celebrity get me out of here
Channel 4- Without a trace
Five- Tripping over

The above scheduling for monday night clearly has pluralistic values; there's something for everyone. "There is no hegemonic message to be conveyed through all media texts"
The BBC being a PSB is routinely airing the news which is a 'neutral' reportage of current affairs whilst on BBC2 you have the popular news quiz which is also topical but in a humourous way, perhaps getting away from the stereotype that the BBC are boring and uninventive. ITV are doing their annual reality TV show which is without a doubt really popular and is talked a lot about in the tabloid press. However this can be seen as part of 'low culture' whilst the BBC airs 'high culture' texts. It is also interesting how both Channel 4 and Five were showing american drama series. Is this american cultural imperialism or simply reflecting the audience's needs who wish to consume american media texts?