Did you try turning off VDC? Does it feel like VDC kicking in even though there are no LEDs lit? Are you able to rev it normally in neutral?
Most of us get this lag as well, but for me it's not just 1st gear. There are times I can punch it in other gears, and it feels like the throttle isn't opening up 100%. It feels like power isn't there under 3k RPM, which was a long time complaint until owners started wondering about the throttle lagging or not opening up fully or fast enough.
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