DSW- there are certainly lots of precincts where this trend will hold, BUT there are also precincts where the opposite is true- Romney loses a few votes. For me, we have to look at as many multiple- machine precincts with varied vote counts as possible. I really have no idea if we will see a trend or not.
I look forward to seeing multiple-machine precincts where the vote counts are similar, too. If those have significant differences, then either your assumption is wrong or there was tampering of a different sort. Or maybe just a probabilistic threshold. Or if there are no significant differences when the counts are similar, but there are when the counts are different, that would make your case stronger.
If fraud was at the tabulator, why release the EVM data at all, when it means having to construct fake EVM data in a way that is consistent with both the precinct total and the individual EVM totals? And if they were constructing fake EVM data, is there a plausible way of doing it that would result in a difference like that one data point, where the one machine looks pretty much like the other one except that Romney got a bunch of extra votes -- and they got the delegate count consistent in that case, but way off in other precincts?