Day 5 embryo grade

Hey all. I had this little day 5 ❄️ transferred yesterday. My clinic told me it was grade A. I looking online and find that hard to believe. I also know that most clinics give you more info like 5aa or 4ab. I'm frustrated. They said all 7 ❄️ were grade A. Now I'm wondering if are just throwing that grading out there to make me feel better. Any one have some pics and gradings to share? Thanks.