At the time of writing, this is the longest storylet name that we have recorded, yes. (Trust me, I have database access.)

And seeing you might be interested, the longest action name that we have currently is <a href="/wiki/This_might_be_faster..._Arrange_matters_so_that_you_have_an_invitation_to_a_gathering_of_%27Admirers_of_the_Invisible_World%27" title="This might be faster... Arrange matters so that you have an invitation to a gathering of 'Admirers of the Invisible World'">This might be faster... Arrange matters so that you have an invitation to a gathering of 'Admirers of the Invisible World'</a>.