Unfortunately OP was right to be pedantic. Consider that you assumed the author went from 1500 to 2100 in 6 months, which would be an absolutely monumental achi

Unfortunately OP was right to be pedantic. Consider that you assumed the author went from 1500 to 2100 in 6 months, which would be an absolutely monumental achievement, and yet the actual article says the author went from 1200 to 1800, which is nice, certainly nothing to complain about, but nothing even remotely as impressive as going from 1500 to 2100. 600 points, in and of itself, is almost meaningless.