For anyone wondering about que wait times at Brampton BLS for walk in application. Here is my experience for today, Saturday Oct 21.
I started to wait in the que at 10pm Friday night, Oct 20th and it took me one hour after opening of office i.e. 9am this morning to get in. Total 13 hours of wait time in que. Surprisingly there weren't many booked appointments which tells me Brampton has very limited slots for appointment and taking alot more walkin applications compared to last few weeks. There were people standing from 10am in the que today morning and they got in too. So its a hit and miss. Sometimes they have crazy line ups and sometimes they don't. The agent at BLS told me they are sending 1000 new applications each day to HCI. They wrote 6 to 8 weeks processing time on my payment slip. Also be prepared to pay $60 per file for corrections and $32 for taking new picture as they will try to find errors in your form or picture. They will convince to you to not choose pickup option only Purolator for delivery. If you do decide to wait overnight in the que, bring a camping chair, place it in the que and you can sleep in your car