Not sure anyone will ever have the number 1 spot without a fight on their hands.
Also despite having an XE on order I'm not sure it's actually ever attained the number 1 spot.
The 3 series has led this sector for years and that's not just based on industry reviews but 9n sales and owners which aided it's reputation.
I hope the XE lives upto all the hype for obvious reasons as I will have one for the next 4 years (company car) but unfortunately for the XE I will be a tough cookie to please as my current 10 year old BMW will be very hard to match with only economy being beaten by the XE
Press seem to think its the new class leader(the xe) , the new 2016 model year 3-series has a bit of extra bling in the cabin and some slightly different lights - surely this isn't going to change things much.