well, I've started my spreadsheet but I'm not finished yet. I'm 2 hours into DL. I'm thinking it will be 2-3/4 hours by the time I'm finished. then I need to do DCA. definitely longer than I planned on. I really hope it's worth it to have the spreadsheets with us on our trip.
For me it is totally worth it on busy days. If you are fortunate to visit on a light crowd day I suspect you will conclude it was not worth it.
An anecdotal story to clarify what I mean...
Last summer I was at DLR with all four of my kids, one niece, one nephew and one of my kids' girlfriend. So I toured with seven - count 'em - seven teenagers that day - all good kids and we had a truck load of fun.
DS18 and his GF wanted to see Mickey at Mickey's house. The others did not want to see Mickey. They wanted to ride Star Tours. Star Tours makes me feel sick and I decided it was good time to hop into DCA and get FPs for Soarin Over CA.
So... I sent DS18 and his GF to Toontown to see Mickey and told him (based on my RM inspired spreadsheet) the wait would be X minutes that day at 9:30AM. I sent the others to Star Tours and told them the wait would be Y minutes. And I headed for DCA and knew it would take me 15-20 minutes to get there and back to Star Tours. We all planned to meet at Star Tours afterwards.
DS18 and GF got to Mickey's house and called me because the line was really long and asked me if he should still wait. At this time I was walking into DCA. I told him RM was pretty good with wait time data and they should stick it out.
Turns out RM was right on with wait times for Mickey's House and they got to see Mickey right when they expected. I got back to Star Tours from DCA right when the other kids got out and, knowing DS18 and GF were still in Toontown waiting for Mickey, judged we had time to ride Buzz LY thru standby before they got back. Why? Because RM said the Buzz line would be like 5 minutes and we could visually see Buzz from Star Tours and see the line was very short. So we rode Buzz and as were coming off the ride DS18 and GF were just getting back from Toontown.
RM's predictions allowed me to tell DS18 how long his wait would be, allowed them to judge if that was worth it to them in order to see Mickey (it was), allowed them to know how long Mickey's line was
without having to walk all the way back to Toontown, allowed me to have enough time to get Soarin FPs because I knew how long ST would take for other kids, and finally
allowed us to get in an extra ride on Buzz LY. All because we had a pretty good idea of how long the wait times were according to RM.
Here is a dummy copy of what my RM spreadsheet looks like for DL (Note data below is
not real RM data).