as far as the connection drops are concerned, it really depends on the Wireless Access Point.
And as far as the wireless coverage is concerned, it depends on the Antenna present on the AP.
I have an AP which was designed in 2005 (a ZyXEL G-570S) and it really sucks. But it doesn't solely suck with my iPad, from time to time it sucks also with my IBM R51 and it does have recovery problems when power it down and turn it again. So all in all, it's really the AP which is problematic in this case.
So I have replaced the G-570S with a TP-Link TL-WA601G and all of the problems have gone! Really. TP-link achieves it thanks to their efficient designs but also to their frequently updated firmware. So, Steve Jobs is more or less right when he says "update the firmware"