While in polite company, one would normally start their heading tags with h1 and works downwards through h6.
However, on E2 the name of the node is contained within h1 tags in the markup, so using an h1 tag within a writeup would place that heading as the same importance as the node title, which generally would not make much sense. (If the title is of the same importance as the node name, shouldn't the title be in a node of that name?)
It would therefore make more sense here (and be more semantically correct) for any use of heading tags within a writeup to begin with h2 and move downwards, since each item in a node should logically fit under the name of the node, which is of heading importance h1.