Estimated by who? By some account on Twitter. Estimated how? By GRE SDU score for graduates. That's better than I expected, except that there is no link to

Estimated by who? By some account on Twitter. Estimated how? By GRE SDU score for graduates. That's better than I expected, except that there is no link to the source of the data, so there's no verifiability. (Note that teqsun linked to the actual source in a top-level comment here. Also note that the actual source ranks "Classical Language" as the second-highest field, which is a rather glaring exception from the impression given by the tweet.)