What is the usual response time after a DTV visa interview at the Thai embassy, and does waiting indicate likely rejection?

No, waiting does not mean rejection. For DTV Soft Power applications the interview is a normal step when the embassy wants to verify your school, your course length and how you will support yourself. Many embassies keep the status as pending for a while after that while they check the documents.

Official guidance says processing takes about four weeks or longer if the file is incomplete, and most eVisa posts report five to fifteen business days after the final interview, with busy posts taking two to four weeks in total. Your timeline from mid August to now with extra documents and then an interview two weeks ago is still inside that normal range, especially for Soft Power where they may ask for proof of acceptance and financial proof. c5d

What you can do now is check your thaievisa portal daily and your spam folder for a request for more proof, and if you have a reference number you can contact the same embassy where you interviewed with a short polite follow up. Do not resubmit a new application while the current one is pending.

You could consider reading a book or two before your trip. I’d recommend Unlock Thailand by Isla Rey on Amazon, it includes all the info and insights you need. You should check it out. A very good companion 👌.

Immigration has a way better idea on this occasion then any of us do.

Keep your fingers crossed.

You might like to state which of the 77 or so Thai consulates you applied through.

In the exact same situation I submitted mid august and had the interview 2 weeks ago. Still no response

Soon you will know the result. Share the updates.

Did you check the status online recently? What does it say?