same here, even with opera mini 19 and android using a 32kbit/s connection.
occasionally opera seems to timeout itself when loading large pages over a slow connection, especially picture-heavy sites are prone to fail to .come up. sometimes several attempts to reload are required, otherwise one has to reduce picture quality or load without pics.
as this seems to happen more frequently nowadays, i suspect that opera might have lowered the server timeout recently, or maybe it's the websites getting fatter and fatter 🙂