Family of 4 applied

Applied(initial): March 20, 2017
Conditional Approval: One of the child approved 5/6/17 Everyone else is pending
Interview: TBD
Approved: TBD
Card arrived: TBD

I am really hoping the process is faster than this... Both of us are foreign born later became Americans, and kids are born in US. The one has been approved for interview is an infant child with no history of foreign travelling other than drive across Canadian border.