I've been running what I'm pretty damn sure is this strain for a few years now. It's definitely SLH and it definitely is the most vanilla, cake, smelling/tasting SLH I've ever seen. Was not touted as lemon cake when I originally got it however a friend turned me onto the idea a year or so ago when he swore mine was the lemon cake pheno. I've never seen another actually named lemon cake, but have seen plenty of SLH and not one is the same as the pheno I've got.
After a nice cure, it absolutely exhibits all of the traits of the lemon cake pheno talked about on riu. It's one of my most popular strains.