Message on GWT: What Now?

This is the message I received after experiencing an extreme drop in traffic (penalty):

Dear site owner or webmaster of http://www. .com/,
We've detected that some of your site's pages may be using techniques that are outside Google's Webmaster Guidelines.
Specifically, we detected low-quality pages on your site which do not provide substantially unique content or added value. Examples could include thin affiliate pages, doorway pages, automatically generated content, or copied content. For more information about unique and compelling content, visit Little or no original content - Webmaster Tools Help.
We encourage you to make changes to your site so that it meets our quality guidelines. Once you've made these changes, please submit your site for reconsideration in Google's search results.
If you have any questions about how to resolve this issue, please see our Webmaster Help Forum for support.
Sincerely,
Google Search Quality Team



I know Google refers to a recently launched wordpress blog that had lot's of bad quality content on it. I deleted the entire blog with all content yesterday. What remains now is only the original hand written content from myself.

My question: will Google algorithm see this change and remove the penalty or do I really have to do a manual reconsideration request?