I’m assuming the {total_results} variable will allow me to to do the following:
{exp:weblog:entries weblog="yourweblog"}
<div class="top">
{if '{total_results}' >= 3}
<h1>Show this heading if 3 or more results exist</h1>
{if:else}
<h1>Show this heading less then 3 results exist</h1>
{/if}
{body}
</div>
{/exp:weblog:entries}???