So I got indirectly hit by negative SEO basically. a Site I had a sitewide link on had like 1,000 buy viagra pages made. Also had some low quality sitewide directories with like 4k links to my site with the same anchor text. I got these links removed, which should drop my back links by 5-6k links. Ahrefs shows these links dropping off yet Google Web Master tools has yet to update anything weeks later. How long should it take for Google to figure out my removed back links? I've also pinged the hell out of the removed backlinks.