Should VB latebinder understand tuple conversions?

The following will fail at run time, because latebinder does not know how to do tuple conversions

``` VB
Imports System
Module C
Sub Main()
Dim i as (object, object) = (1, (2,3))
Dim o as object = i
Dim x as (integer, (integer, integer)) = ctype(o, (integer, (integer, integer)))
System.Console.WriteLine(x.ToString())
End Sub
End Module
```