I am testing 2.1.0-rc.1
When you enter the description for a category it doesn't show on the menu page. It does show in the source code but on the website itself.
<h3 class="hidden-xs">Pizza Bar</h3>
<p>12inch pizza all our pizzas are prepared with home made fresh dough, savoury tomato sauce, Mozzarella cheese and the finest quality ingredients</p>
I think this is the same for all versions not just 2.1.0-rc.1