Google Page Rank, Personalized Search, DataCenters

For the last few months, I have been high fiving myself that for my key term, homeschool curriculum, I am almost always number one on Google.

Today, I wondered if that is only true for my search, since there are personalized searches giving different results to different people, and to different data centers. I tend to use the cool seo tool and it always shows me number one to. But it too might have become personalized since I use it alot!

So I tried a different free seo tool and found the following:

Google Datacenter - 66.249.93.104 - #1
Google Datacenter - 64.233.179.104 #1
Google Datacenter - 216.239.51.104 #1
Google Datacenter - 66.102.9.99
Google Datacenter - 66.102.9.147
Google Datacenter - 66.102.9.104
Google Datacenter - 66.102.7.99
Google Datacenter - 66.102.7.147
Google Datacenter - 66.102.7.104
Google Datacenter - 66.102.11.99
Google Datacenter - 64.233.189.104

Woa, I'm number one in every case. What have I learned?

Is it possible that my personal login was somehow communicated thru that search so that they knew what I was looking for? Not likely, so I'm number one in every case. I guess I'll keep high fiving myself.

Or, I could check out homeschooling curriculum.

Google Datacenter - 66.249.93.104 - #6
Google Datacenter - 64.233.179.104 #6
Google Datacenter - 216.239.51.104 #6
Google Datacenter - 66.102.9.99 #6
Google Datacenter - 66.102.9.147 #6
Google Datacenter - 66.102.9.104 etc
Google Datacenter - 66.102.7.99
Google Datacenter - 66.102.7.147
Google Datacenter - 66.102.7.104
Google Datacenter - 66.102.11.99
Google Datacenter - 64.233.189.104 #6