"You are indeed correct to point out the inaccuracy. Urban legend had it that it the line was delivered by the current White House incumbent. Having gleefully jotted this juicy titbit down, I can assure you I went on to watch the full speech on youtube and, as you say, found no trace of it in W's eloquent eulogy.
A minor search proved it to be have actually been delivered by his father (thus altering the tenor of the comments greatly), but somewhere along the line a couple of wires got crossed and I kept the original line as it was.
Bush jnr. has, as you point out, made himself a big enough target for lampoonery that anyone feeling the need to satirise him need never have to resort to fabrication. That was never the intention.
The piece will be duly ammended at the first possible opportunity.
Apologies for any offence this might have caused.
Adam Lee Davies"