She ran some of her slowest 100s almost immediately before that 12.5 though!
Her 100m PB is 11.24, from 2006, but she only ran 11.49 a month ago.
In 2005 she ran 11.59 flat and 12.76 over the hurdles. One year later, her flat speed had improved to 11.24 and her hurdles time to 12.56.
Did her flat speed improve or did she just get better conditions for the meet or was her training schedule different? I’m not so sure because she ran plenty of mean relay legs at LSU (when they were national champions!), but hasn’t been considered for any relay work since then.