I'm not sure starting small is a good idea for beginners, nor how researchers and therapists approach this. More often than not, small doses tend to create anxiety without any real breakthrough in experience.
Interesting, this idea seems antithetical to my personal experiences (not that that has any impact on objective truth). I also find this odd given that when LSD was legal and used in conjunction with talk therapy (to arguably great effect) patients were given doses of about 25 ug (1/4th of an average lowish dose).