I noticed this the most during the air force one minigame in the gold saucer... I would move the mouse and it would take 0.3-0.6s for the cursor to catch up. I also sometimes drop ability actions and having a hard time dodging certain attacks even while paying attention to the casting gauge.

This could be trouble once I get to harder content... right not it's just inconvenient.

P.S.: my connection is excellent... though my router drops me occassionally when it needs to update.