I ride Campag except for the CX beast which is Shimano.
Main drawback of Campag when compared to Shimano/SRAM used to be the limit on largest rear cassette. However, I believe things have changed a little and you can now get a Campag cassette with 30 teeth on the rear.
I did PBP with a compact (50/34) and 13/27 on the rear. Also did BC and BCM on the same bike. No walking involved, and although I tend to go light, I am not the 75kg rider but more the 90+kg rider. I even managed a 5kg saddlebag on the BCM.
I agree with standardisation and that is why I have Campag. However, my 10 speed Shimano wheels/cassette works fine with my Campag levers and vice versa with Shimano. Always use SRAM chains. Weird!