Have a setting that only displays results after a certain amount of votes have been submitted. This way most people would not be influenced from the results as they are coming up.
We do have the ability to hide the bar charts and the results while you are receiving responses: https://www.polleverywhere.com/support/articles/presenting/instructions-view
However, there isn’t a way right now to automatically switch from that to showing the results. It requires clicking the button while you are presenting. We’re always hesitant to add an automatic change that may take the presenter significant practice/exposure to get used to.
One thing we have been considering is the ability to customize a “click” or “presentation” flow that can become the default. Such as all polls would hide the results initially, then you could click the right arrow key to show the results, then the right arrow key again to move to the next poll question or slide. Would you be interested in something like that?