-We don't provide specialisations of Prelude functions for <Literal>Float</Literal>
-(but we do for <Literal>Double</Literal>). If you end up executing overloaded
-code, you will lose on performance, perhaps badly.
-</Para>
+If you're using <literal>Complex</literal>, definitely use
+<literal>Complex Double</literal> rather than <literal>Complex
+Float</literal> (the former is specialised heavily, but the latter
+isn't).</para>