True, although I also question the value of "performance" differences that are small enough to go unnoticed. Maybe it's due to filling in visual gaps by context

True, although I also question the value of "performance" differences that are small enough to go unnoticed. Maybe it's due to filling in visual gaps by context (complete words, meaning of the sentence, etc.), but I think I would notice if the text I'm reading were regularly making it all the way up to higher mental processes with the wrong meaning.