So, those who have ridden both do tend to prefer the newer model, but those who only have the older one are happy enough with it not to be tempted.
The comments would tend to tie in with the idea that all they’ve really done is fitted a longer fork and reduced the head angle so that the three contact points are in pretty much the same position (relative to each other and to the rear axle). That would explain why the climbing is pretty much unaffected but it feels a bit more stable on the way down. It would also suggest that you could get a very similar feel from an older model by using an angle reducing headset and a longer fork.
Not quite but it’s hard for my small brain to explain. The travel has not really changed either with the 2007 with old geometry running 140mm and the current one the same.
I guess the easiest way to put it is if you’ve got a pre 2008, especially 2006 or older, bike and upgrade to a 2009+ you will see a noticable improvement (nearly everyone) and be a happy bunny, just like I was. However, that’s not to say the older bikes are mince.
My advice would be if you have the funds to get a 2009+ bike go for it, you won’t be dissapointed but if you don’t or don’t want to your earlier bike is still well up to the job.