Data caps and app updates

Is it just my impression, or nowadays many people with smartphones, who also have a data-capped connection at home, conserve their list of apps to update until they go to a friend’s house, find free (or school/work) WiFi, or otherwise find means to avoid having automatic updates use data on your Internet connection?

Personally, I put all of my machines to update on the last two days of the month, to avoid that situation where my stupid ISP limits the connection speed to 128 kbit/s, after I use 15 GB of data in a single month (if I can’t avoid the situation, at least the speed will only be ridiculously low for at most two days)… yeah, that’s the state of 3G data plans in Portugal (across all ISPs).