I'm in the UK and on some rare occasions, I can craft fast enough that it doesn't finish the previous animation. *shrug* Also, timing seems to be key, because when I spam enter/clicks, it doesn't work as fast as when I try to time my clicks/enters for the right moment.

Doesn't always happen, but it can. I don't honestly care when crafting or mining, though... I care in battle, a little, but latency will always occur to some extent so I don't lose any sleep at all.