No one I know here can knock one out in less than 15 minutes unless it's a routine BLS. I've often done routine ALS written PCR's in 5-10 minutes consistently. There's still the problem of securing multiple refusals onscene with only one tablet.
Additionally, with the ePCR's capacity to fax reports to the hospital, agencies will be tempted to require units to respond from the hospital before completing the report, since they can run it and complete multiple reports later during downtime and fax them. No more "one call at a time". I can run forever, provided I'm only dealing with one pt/report at a time (with the exception of loading up two pts on a BS Allstateitis MVA).
We did this in Charleston, and it's absolutely miserable. You're pulling up to the ED, and the next call is on the screen. You quickly drop off the pt, get the blank tablet signed, and then go off to the next call. Repeat maybe four or five times. It's no fun playing catch up at 0230 completing 4-5 reports when you should be sleeping, having run consistently for 18 hours or so. It's even better when the 0700 shift change comes, and you're staying late to complete the PCR's, since they can be synced to the station computer. Not for OT, but on your own time. It's even better still when you're doing this on the back end of a forced 48 hour shift. I'd rather eat a bullet than go back to that.