Secure Check is good if you live outside the US. I'd have to wait a month if I use Standard. With dhl, it bounces around a dozen or so different countries before it reaches me around 5th or 6th of each month.
Secured check is recommended for more secured delivery, but google will charge you for that. If you feels that the charge is burdening, then go for standard delivery.
I live in India and i always used secured delivery as postal system here is pathetic until you live in big cities...
Checks sent through standard delivery and secured delivery are same just method for deliver of them is different. Standard delivery sent through ordinary postal air mail and secured delivery sent through courier with receipt. DON.
I live in small city of India but I regularly get my check on the 3rd of every month by normal delivery. No one day less or no one day more. For me DHL is slower than normal delivery!!! I remember, I got my first check by DHL on 10th. But It depends on each city.