I think "cyber love" can exist, but it is limited. If you do everything without meeting the person; chat, email, skype, phone calls, letter and birthday cards, videos, whatever, a strong foundation could be built.
Love comes in many forms, but I would think for most it would involve spending time with the other person, face to face, even if it is not all the time. I believe it would be very difficult to find "true love" without making the relationship non-cyber first. Everyone's different though, some may fall consider their cyber love to be true, and that's great for them
. Difficult for most I still think.