I withdrew BEAN yesterday on BTCPOP and it lasts less than 5 minutes, including e-mail confirmation.
I used to sprout on POSW back in the days but once I did a comparison of rewards between POSW and the Bean GUI it became apparent that there was no comparison. My Bean Machine does a pretty good job of generating satoshis for me.
That is true as I used to sprout beans on POSW as well back in the day as back then I only had my laptop which was 5 years old at the time and it couldn't handle sprouting beans as the wallet was too big and took up a lot of disk space. Sprouting your own beans is also the best unless you have a small amount, then it might be good to use a staking pool but then again that comes with a risk.