Are Block-Style Text Pirctures ASCIIs?

[Cumbrowski.com]

I asked the same question a while ago at my blog see:
http://www.roysac.com/blog/2006/08/asciis-that-are-not-asciis-or-are-they.html

Let me quote parts of my older post to explain what I am talking about
here

> The Extended IBM Code Pages (Code page 437 in the US and 850 in Germany) are part of the
> 8-Bit DOS character set and a proprietary (ANSI) standard by IBM.

> The Extended Code pages include several special Graphical Characters that go beyond
> the 7-bit US-Character set of 128 characters supported by any other Operating System
> on the PC and Mainframe including MAC, Unix and Linux.

The question is, if art that was created, using those extended and
propriatory characters, which are not part of the US-ASCII standard
can still be called ASCII or not. Some suggest calling them ANSI, but
ANSI implies the use of the special MS DOS ANSI.sys formating (Colors
etc.).

What do you think and why?
Cheers!
Carsten