MVC is helpful for running queires - response (1) by goldminer

No one can say for sure because of all the unknowns associated with your situation and queries, but more rows per block many time results in better query performance.  Usually MVC can achieve both space savings and query optimization. I know this is not the case with your situation, but sometimes MVC can be enough of a savings on smaller tables that the optimizer will decide to move the table into memory which of cource can be a performance boost.
 
Joe