I am seeing google get slow in indexing. If I see cache than I found... google.com last cached on 7Feb yahoo.com last cached on 7Feb msn.com last cached on 1Feb. Also, I have checked this on 10Feb, it was... google.com ----- 29Jan yahoo.com ----- 29Jan msn.com -------01Feb It also means google is showing indexing info late in cache. like- It was 29Jan for google.com on 10 Feb, but today (13Feb) it is 7Feb. Have you also noticed this? Is It some algo shift or just google hiding info from seos? OR Google really become slow in indexing? (Although there are number of efforts by google to develop its indexing part)
Results of any kind, are highly unstable these days. If you get any inconstancies, just wait on, until everything settles down. I frequently get complete drops (under #500) for certain keywords, from #8, and the next day, it's back. And so on.
First of all, if you're going by the cache date with Google, you can pretty well throw it out the window. I made a series of minor changes recently for a client of mine over the course of a month, and as the changes made their way into the Big G index, the cache date changed. The problem was that the cache date and the version of the site that was cached almost never matched. Sometimes it was older, sometimes it was newer. As far as BigDaddy goes, it's not just an algo update, it's an "infrastructure update". What that means exactly, no one really knows, because infrastructure is nothing but a corporate buzzword meaning "we've got something in place that we think is going to help us, but we're too lazy and stupid to define exactly what it is, so we'll use the mot de jour instead." The problem with BigDaddy is that it hasn't spread to all of the datacenters just yet. So some of the flux may be as a result of this. The one thing that I've found speeds Google's indexing up is to acquire a backlink from somewhere that gets indexed daily (or more) itself every time a change is made. e.g. every time you make a forum post in a new thread, you get the backlink that Google crawls and reindexes. So...ignore the cache, keep getting IBLs, and as long as you rank in the SERPs, 99.999% of your visitors really won't give a damn which version of your site Google has in its archives anyway.
Okay, I ignore the cache date as far as visitors are concern. But when I an SEO concern, I can't. I have to see the cache again and again and than cross check the effect in SERPs. It is not only IBLs matter for ranks, it is On-Page SEO also matters. Well, It is nice stuff. But I am not getting what do you mean by change in infrastructure.??