I'm praying that I'll actually get it the day before it's supposed to be released, on the Friday. GAME are absolutely fantastic when it comes to preorders: they dispatch two days before release, and half the time it arrives the next working day.
However, I have a copy of X preordered at the closest store, which I'll go pick up at around 9am (or whenever the store opens...if it opens for midnight, I'll try and get a lift in, because the last train is at around half eleven, and I don't fancy busting my wallet on a cab or staying in town until 7am) if it doesn't arrive in the post...with Royal Mail being what it is right now, I'm leaving nothing to chance.
I have both X and Y preordered online - I won't be playing both at once; my mum will play Y - and a copy of X at the local store, so I'm covered for a guaranteed launch copy. Haven't been this excited about a Pokemon game since HG/SS!