Well that is a very good observation MP3Kid..... good to see people are really experimenting with this stuff....
But I think the opening statement of the post is a little extream. You may very well be right and we all should investigate the mod you speak of, any improvement is a good improvement.
But with the numbers out there succesfully using the Sproggy design it obviously is a GOOD design and all in all is probably the best available right now for people doing this.
But as I stated above, very interesting observation... I will trinker with the idea. I just got the final parts to build two more Sproggy 2.7 PSU's so I will try to duplicate your finding.