Apparently it was 'watery pap' and 'tenth-rate drivel'.
McColl fitted my dad's and uncle's critical post-Victorian generation and location all 'stodgy' attitudes and in Beckenham!(my uncle's house was actually 300yds from McColl).
I always felt war-time austerity and living through it made them like that.
In fact in the 60's if there was anything new and a bit flash my dad would dismiss it as an 'American idea'.