QoQ: Invalid Column Name Hack (Quick Follow-up)

Just a small note. I noticed the CF9 beta documentation mentions a change in the IsArray function:

Changed behavior: if the value parameter contains a reference to a query result column, this function now returns True. For example: isArray(MyQuery['Column1']) returns True. (In earlier releases, it returns False.)

So the QueryAddColumn hack may be legal in CF9 after all.