Everything is very big here.
Other than that, because my first real day was spent in the quietness of my grandparent's home (they live outside of the city, in the woods, so there is no shock-factor for me), and now at home where I'm very used to things, I haven't had any problems readjusting. Maybe a bit of jet-lag, around noonish yesterday, but I'm always jet-lagged after the return trip.
But I love the WLAN, the wireless internet. LOVE it.