I notice sudden changes in Google's behavior in last 2-3 days. Normally Google index my blog posts with in 1 hour. Last 3 days its indexing speed is very low and only indexing 2 to 3 posts in 24 hrs time frame, this happening across my all blogs in various niches(5 blogs). Any one has this experience recently?
All I can think of, is, is that for some reason, Google lowered the importance of your blog and your SERP.
Don't worry about that. If you are running a site, you may have the similar experience soon or later. Google is changing everyday indeed.
It's normal. After a few days or a week, indexing should be back to normal. I experienced it a few times.
I have noticed some changes across many sites. It seems the lower PR ones are getting indexed much slower. Not much of a change on the higher ones about 12-24 hours.
Anything with lower traffic and such is bound to see a slow down in indexing. I've had this problem on and off with one of my sites for as long as I can remember, even if traffic was good. I'd just stay calm and like everyone else has said, it would be back to normal relatively soon.
This weird indexing activity had been spread around the board for a while already. I do not think it has to do with deep link as I thought it was. There are dropped in step to step (-30 then +30 then -30 and on and on)