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A long time ago perhaps up until even Phenom2 processor from AMD I used to hear people saying AMD systems felt snappier even though they weren't benchmarking as good.

Does anyone have a solid explanation was it just rumours, fanboyism or there was something about the system. I just thought about context switch or syscall overhead was that ever meaningfully different.

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Way back in the day particularly the Athelon / Applebread days and chips had the first on-die memory controller for consumer processors. While they had fairly significantly lower IPC than some Pentiums (remember the Pentium D egg cooker?), they had much better memory latency. Hard to prove anything - but some people claim they were quicker

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