Hang on a minute, you're completely misreading what I've said.
The 900 links were from the sabotage. All directory links. I didn't mention how many links my client has.
The 'bad' links are obvious. 150 links to a page all with the anchor text "widgets". They stand out like a store thumb.
The good links are from massive publications, which were acquired from being the best source of information in the niche.
The day of Penguin v1 traffic took a massive hit and continued to decline to 50%. It's definitely a penguin issue.
But this shows just how easy it is, to destroy a sites ranking. People underplay just how easy it is.