Pretty much in all of these attempts to replicate they are running about 7 seconds quicker. I think what would be of note of importance is that if Eli took an estimated 15 secs then he fired 10 rounds at a pretty steady disciplined cadence which is important. It's not about how many rounds you can get off as quickly as possible but it's how many rounds you can get on target at a steady controlled pace as possible. I think that was a contributing factor in Eli's success. He was definitely disciplined under the stress of the encounter which is quite impressive.
The part that I keep thinking about is that those 15 seconds include the couple of seconds it probably took to realize what was happening, the time to get the girlfriend safe, the time to locate the threat, and THEN engage.