Actually that's not related. Bandwidth issues that some people are experiencing are by design limitations that prevent spamming the blockchain. We are trying to figure out more user friendly algorithm (while still preserving that precious feature) but it would take some time.
Each Steem user has Steem Power that represent their shares in the platform. It is used not only for determining how big is your impact while deciding about rewards allocation but also how much of a whole platform bandwidth is available for you to use.
So when the platform is heavily utilized, those who have very little Steem Power have to wait a bit before they can transact (post, vote, etc). One simple solution (other than waiting or making less actions on site) is to increase your share by getting more Steem Power.