Bottleneck is when a component hold the performance of others components...
Said that the PS4 seems a balanced machine, so I agree with developer... the CPU, GPU, memory, bandwidth, etc... all the part fits one with another to avoid all the possible bottlenecks in a system.
You won't read developers saying the CPU is slows and holding the GPU... or if there are more RAM I can make better choices... etc.
The system is balanced to extract close of 100% of the all components.







