"CREATE TABLE table_name AS EXECUTE name WITH DATA" becomes syntax error.

Hi,

Accroding to http://www.postgresql.org/docs/9.1/interactive/sql-createtableas.html ,
"CREATE TABLE table_name AS EXECUTE name WITH DATA" seems a right syntax,
but,this statement becomes a SYNTAX ERROR.
Is this a specification?
---
naoya=# SELECT VERSION();
version
---------------------------------------------------------------------------------------------------------------
PostgreSQL 9.1.1 on x86_64-unknown-linux-gnu, compiled by gcc (GCC) 4.1.2 20080704 (Red Hat 4.1.2-48), 64-bit
(1 row)

naoya=# PREPARE GETONE AS SELECT * FROM SEED WHERE ID=1;
PREPARE

naoya=# EXECUTE GETONE;
id | date
----+----------------------------
1 | 2011-11-24 11:24:49.675427
(1 row)

naoya=# CREATE TABLE NEW_SEED AS EXECUTE GETONE;
SELECT 1

naoya=# CREATE TABLE NEW_SEED2 AS EXECUTE GETONE WITH DATA;
ERROR: syntax error at or near "WITH DATA" at character 42
STATEMENT: CREATE TABLE NEW_SEED2 AS EXECUTE GETONE WITH DATA;
---

Regards.

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Naoya Anzai