The summary of electronic counting is negatively biased against the electronic counter. It gives the impression that you can save a few bucks as compared to the price of the Jones, but you get a much more difficult-to-use counter.
In fact, there is much more to the electronic counter than its low price. The superior readability and the instant zeroing capability make it much easier to use and less prone to errors. While riding a bike it can be read at a single glance without the distraction of getting a reading from the Jones and the fear of overshooting a goal. Thus it allows better attention to road safety and determination of the shortest path. Also, if this path is not obvious in the road ahead, the measurer can easily freeze the meter on a road mark and scout ahead on the bike before resuming measurement.
I fail to see why a certifier has to have experience with the use of the electronic counter before he can judge if a measurer is operating it correctly. The easiest way for a measurer to demonstrate his ability is to use the electronic counter simultaneous with a Jones and show that he always gets precisely the same on both counters. (If the measurer does not have a Jones, I should be willing to lend mine.) Alternatively, he could remeasure a certified course and show that results are close to that of the original measurer at all points.