He's referring to the previous work of Joux, such as this: https://eprint.iacr.org/2013/095.pdf https://eprint.iacr.org/2013/095.pdf. "Today's" result is an im

He's referring to the previous work of Joux, such as this: https://eprint.iacr.org/2013/095.pdf https://eprint.iacr.org/2013/095.pdf. "Today's" result is an improvement over that and previous works. So what we know is that attacks on curves over GF_{2^m} are getting better.