I think you miss the point if you are serious about the speed issue for such trivial reasons. People worried about those types of things just ditch during communion anyway. As I stated earlier, we are crossing in the parking lot between masses now even using the EMHCs to help with communion. With 8, 10, 12 & 4:30p English and 2p, 7p Spanish I really don’t see how the schedule could be adjusted. Our communion is no where near 10 minutes either. I’m standing on my feet in the choir during everything except the homily because of the design of our church, so 10 minutes for communion would be a blessing at that point if it could be done properly.
Your mathematics aside, I’m still waiting on a real solution for large parishes where people actually show up for mass.
In your earlier post you claimed over 21,000 registered members of your parish, plus a huge number if memory serves correctly of unregistered who attend the Spanish Language Masses, possibly due to illegal status. Impressive figures to be sure.
Your Parish, which I tracked down by the tantalizing bits of information you posted reports an average Sunday Mass attendance of 7821 This includes the saturday Vigil figure as well. That works out to about somewhere around 1/3 of the Parish enrollment. If yourr claim that many of the Spanish Speakers are not registered with the Parish to begin with. it would further cut down on the registered Mass attendance as the non registered are still counted in the avearge weekly Mass figures. So the percentage of registered members that actually attend Mass is more than likely lower than 30%
Don’t feel bad though, that is actually a pretty good figure . Many parishes report only 1-10% attendance of registered members, even in Dallas, imagine that. sad very very sad.
You neglected to mention the Saturday Vigil Mass which is very well attended according to my source over there, and often, in fact usually has more than the Sunday Masses do. The Life Teen Mass(4:30pm) however, is usually smaller in attendance than the others.
I’ve already crunched the numbers for your parish, and in certain circumstances, ie: missing one or more of your Deacons or Priests, you may need one of two Extraordinary Ministers to maintain a communion time of around 20 minutes or so, which I think is pretty good.
Adjusting the schedule would be easy enough, start the first Mass at six am. Move the vigil to 5:30 or 6pm and possibly add a second vigil. That is allowed, but requires approval of the Local Ordinary. Move the life teen to 4:00pm Saturday, that is usually the earlist you can start a Vigil mass. The kids would love that., Better still, scrap Life Teen all together and replace it with a regular mass. Just a personal prejudice I guess, I’ve never seen much need for Life Teen Masses, anyway. Sorry Replace it’s Sunday time slot with another regular Mass or even communion service That would give you two or three additional masses/communion service and cut down on attendance at each of the other Masses. See simple

.
But, just in case these solutions are unworkable in your parish, Extraordinary Ministers would be needed to get times down below 20 minutes.and close to that magic ten minute mark,
You do have a pretty Church and the Chapel is very impressiev

I was also impressed that you have statues of Saints there. I’ve always liked St Teresa de Avila and St Martin de Porres. Many newer churches, built in the same time frame as yours, regretably don’t have them
Best wishes and rest assured of our prayers from out here in Sunny Southern california