Just to pile and beat on your bruises a bit, you're spending too much time, especially in the second abstract defining the problem. You need to define the problem space within one - three sentences and then talk about what the attendees are going to get out of your session. I try to focus there. If I were attending, would I understand what it was I was getting ready to go over. If I didn't, you had better be a known speaker or I'm just going to skip your session. Time at the Summit is very tight, so picking and choosing sessions is really a matter of triage. If I'm unsure you're going to make it, we're sending you to the dying room.