I'm not sure Ricky Gervais, Stephen Merchant and the BBC would agree.
TO be fair, I think there is a certain amount of truth on both sides of the fence (dear God, not me playing the mediator - hell must've frozen over...)
In the UK, the art of the serial drama does appear to have been lost somewhat; both the BBC and Channel 4 seem to have been concentrating on film productions over recent years (C4: The Crying Game, Slumdog Millionaire, The Madness of King George, Elizabeth, East is East; BBC: The Other Boleyn Girl, Brideshead Revisited, Notes on a Scandal, in both cases to name very few.)
I presume this is at least in part because the revenue generating opportunities are that much greater with films - apart from anything else, British serials seem not to go down well in the largest English speaking market where if they do take them they seem to have a habit of re-making them (often badly - see The Office.)
That said, things seem to be stronger in UK comedy - Peep Show, The Office, The Thick Of It, all outstanding.
But, we haven't produced a decent crime drama in my opinion since Inspector Morse. I don't think anyone, anywhere has produced anything in the same league as Inspector Morse since to be honest, BUT shows like Law & Order (and its derivatives) or Bones which I find very enjoyable are uniquely a product of US television these days.
Incidentally, it's interesting to note from the HBO website that a number of their featured 'original series' productions are either BBC co-productions (The No1 Ladies Detective Agency) or straight imports from the UK (Da Ali G Show, Extras, Little Britain USA.)
One of the differenes though seems to be series length. The average UK series is about 6 half-hour episodes; longer 1-hour episodes are a relatively recent phenomenon, but series remain very short.
The standard US series seems to be about 20 hour long episodes or so. This can be a good thing and a bad thing.
On the good side, it does indeed allow greater character development and more time for characters' back stories as well as the fundamental plot.
On the bad side, it does also allow for an already thin story to be stretched to breaking point, and 'character development' which is not character development at all, it's just filler. The twin concepts of an episode which consists of 90% flashbacks to previous episodes with 5 minutes of original content to pull it together, or the episode which consists entirely of 60 minutes of "how one character broke her toenail" are unique to American drama.
My personal summary would be that I think popular drama serial making is indeed stronger in the US than the UK at the moment. BUT, on the other hand, US dramas do often suffer from the failing that they are *too long* and have *too many series* - the idea that if something is brilliant for the first 6 episodes then all you have to do is wash, rinse and repeat for another 60 episodes and it'll still be brilliant is somewhat flawed; too many US series seem to be allowed to somersault the shark backwards before they know it's the end.