You're welcome, Geoff!
No, this is not the case in Sitefinity 4.x. Actually in the new version we don't have a Polls module anymore, but a far more flexible Forms module, which allows you to create all kinds of rich forms (Polls as well). Each of the form controls, which are available with the module, can be customized. This includes chaning the number of characters that can be inserted in a texbox or other form control. You can take a look at out documentation
for additional information about the Forms module. There's also a video
, which I believe you will find interesting.
All the best,
the Telerik team
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