There is a great facebook group for parents of Jan admits–I can dm you the link if you like! It has been helpful to hear from parents that have been through it, and to get more anecdotal information about the experience once students are back on campus in Clinton. I worked in study abroad for many years and Arcadia has long been a program provider with an excellent reputation in the field.
My older child is now a sophomore at Smith College. She started on a “normal” Fall entrance timeline, and made friends quickly. And by the end of Spring semester, those friendship groups had all shifted and evolved. When she went back to school this Fall after doing an intensive internship in DC all summer, her social circles reset once again. It is pretty typical for students to experience changes in their social landscape from Fall of first year to the end of their time at their college–whether they enter in Fall or January. With this perspective in mind, it really doesn’t feel to my son like an undue hardship to overcome.