Hi vanoh.. Yes I can answer your question, my file was transferred to Detroit in February, from Buffalo.. They requested info at that time which we sent them, about 5 weeks later they requested more info and sent a form for him to sign we sent back with in 2 days. You can expect at least 4-6 week delay in processing each time they request new information. On ecas your update may not change out of "processing" as like alot of other people, so don't pay attention to the ecas, it only makes you more anxious and I know this from experience.. Just hang in there, I know waiting is hard and being patient is even harder, but look at the bright side of being sent to detroit, their processing time is shorter than Buffalo's by about 3 months...
Good luck oh and this forum is great had really helped me alot and I'm glad that I can offer some advise and information to another person going through the same thing.
Lasiar