Yes it is, but when new posters get on here 90% of the replies they get are HE and IR related. Lower half drive is not something I see discussed much outside of that pinned threadIMHO, she is coming off as one more pitching guru trying to sell something as the "one true way" to pitching nirvana.
???
DFP has the best resource for lower drive mechanics on the Internet. Java's drive mechanics thread is a masterpiece.