Response time ever since I can remember always vary between 2 weeks to 6 months... No one know how the queue works exactly... I got called for my first interview just only 2 weeks after I applied, whereas some of my coursemates had to wait for 5-6 months... And this was couple of years back...
As for submitting other documents, why do you have to be worry about? Just submit whatever you think will make your application better. I attached the whole scanned pages of my PPL and logbooks together with my resume...
Cheers and good luck..
JA