No. For ab initio that's not important. It only takes 40 hours to get the PPL ; after that, learn the 'big airport' skills. Of course, if you spend your whole life in the backwaters then rock up to Manchester or Liverpool you will be out of your depth. But during my ab initio at Barton I made sure Man LPL and BPL were regularly visited. I loved the RT and procedures as well as learning to fly!
My first ever aviation qualification was my RT licence! Before I even went solo (at 10 hours - try doing that at Big Airport).
Learning at Barton and being ace at RT and big airport proceedures are not in any way mutually exclusive. But you can add a lot of time to your basic training and miss out on some well developed stick and rudder skills if you do your ab intio at a Big Airport.