Sometimes it takes a while.
If you provided references, we have to get in touch with them and sometimes they can be hard to get a hold of.
Quite a few agencies are Not reference friendly. (BI, Temp U, the florida touring agencies, BDJ are just some examples).
If you are using them as a reference then a lot of us can't accept that.
If you have P-411 or date-check with OK's then you can be verified in a snap.
Sometimes applications get lost in cyber land and we do not receive them. If after 4 or 5 days and you haven't heard, try emailing.
I don't know about the other services, but I take screening very seriously. I do not ever screen on the phone, its impossible when you have 4 lines ringing and girls texting.
Sometimes screening takes some time, its not something that usually can be done in 10 minutes after we receive the application.
I m sure your not being ignored. try emailing