I will wait and see what the car drives, feels and looks like before writing it off. If it is better than the F30 3 series i will buy it - simple. The XFR took on the E60 M5 a couple of years ago and won its fair share of comparisons.
All i'm saying is that Jaguar have the capability to build a credible F30 challenger - and no one knows how good/bad the F30 is going to be - if it continues down BMW's current path of producing less driver focussed cars in favour of appealing to the masses then the Jag may be an option.
2014 AW F80 M3 DCT
2011 AW E90 M3 DCT - Sold
2010 JZB E90 M3 DCT - Sold
2009 6MT E90 LCI 335i M -Sport - Sold