GNet Proper Practices?

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If I sync 10 times a second, won't this be much too unresponsive? Here's the long-case scenario:

0ms, client clicks to fire
100ms, client syncs - sends shot to server (lets say 60ms travel time)
160ms, server receives shot
260ms, server syncs, notices & processes shot,
360ms, server syncs, sends shot's effects to client
320ms, shots effects reach client
420ms, client syncs, notices a& processes shots effects

Now, this is if the packets are hitting them at a bad time, ie: with the 100ms gap between syncs at its maximum, but still, won't syncing that infrequently result in very noticeable (and almost unplayable) delays?