I just read in a comic book How great is it that your partner knows so many good restaurants! Is this substandard English? Or are there some types of clauses (e.g. It-clefts) that have exclamative versions both with and without Subject-Auxiliary Inversion like (1) and (2)?
(1) How great it is that your partner knows so many good restaurants!
(2) How great is it that your partner knows so many good restaurants!