Something that you may see fairly often in forums like this, are people loudly and confidently proclaiming that anyone who isn't ready to meet them face to face within at most, two emails, should be discarded as a "time waster."
This is bravado on their part, there are never any rules to this stuff. In non-online interactions, you'll also run across people who have established a sequence of expectations as well, and they will try to make you feel like you are standing in the way of the forces of nature itself if you refuse to go along.
This is because SOME people want to turn everything into an industrial process, including human relations. Ignore them. They are doing that, because it artificially makes them feel more in control of their lives, much like prejudice of any kind does.
The important thing is, to find and follow whatever process and pace makes YOU feel that YOU are on the right path for yourself. Not either rushed, OR slowed down. Let them follow THEIR instincts, for THEIR lives. If that means that every now and then, someone who you were attracted to ends up rushing by, don't fret. The fact that they were intent on moving at that speed, and oblivious to your sensibilities, means that they would not have been compatible with you even if you HAD set aside your boundaries and considerations.
Excellent advice and applicable not only on dating sites, but in a real life situations as well.
