i've met couples who've met and married over the net.
i'd say their relationship is probably better than average.
finding their 'one' over the internet made the search better in terms of compatibility.
but if you are going to go down that path,
i'd suggest for you to be extremely weary and cautious.
over the internet we can often be seen as showing the best side forward.
meaning by that, potential 'interests' over the net will most likely be putting their best face forward.
same as on a date in real life.
they'd likely be on their best behaviour.
if you really want to know what someone is like.
examine how they act/react when placed under pressure, whilst with friends.