For me, 40% is not that good. Actually it's pretty bad for the first weekend after a 100 Euro price cut. Also UK > rest of Europe so it will most likely be less than 40% boost outside UK.
On top of all that GT5P will be release in 2 or 3 weeks and that will push the PS3 way ahead again.
MS is betting a lot with 100 euro price drop to stay competitive in Europe but if this 40% boost proves to be correct they will lose their bet.







