you are welcome! 

Nop, it will definitely not stake instantly! I think these days are over, the difficulty is rising and the inflation control is working too fine...

Had a look at my wallet, got a lot of 5k blocks waiting now since 30 days, also got some 7.5k blocks and they also chill around since 20 days!
Tomorrow i'll split some new blocks, maybe i can tell in around 10 days, which amount of coins will stake instant!(in our case, i would say plus 1 day is kind of instant)