Agilebits 1Password support and Design Flaw?

[epixoip]

The remarkable cracking speeds you have are far more due to what you've done with SHA1 in GPUs, but there is this design flaw as well.

a lot of the sha1 optimizations do not apply for hmac-sha1. the remarkable speeds come from cutting the total number of transforms required by 75%. defenders have to do 4x more work than an attacker, and that is a design flaw which leads to remarkable cracking speeds.