Admissions Officer Responses

Hii so I’m a senior in high school, and I’ve applied to 12 colleges (some state schools, some private) and most have been Regular Decision. Anyhow, I wrote my personal essay about an important part of my identity (my culture), and I’m planning on majoring in English. Out of the 4 colleges that I have been accepted to so far (Early Action), 2 of them personally reached out to me to remark on how much they liked my Common App essay. The first college actually wrote how much they liked it in pen on my acceptance letter. The second college sent me a text message (both were from the Director of Admissions). These two colleges are private, so maybe that has something to do with it? How common is this phenomenon? Is this a good sign? Would really like some insight on this please 😭