This is my bad. We've heard a few people complain that the word "personalization" has been adopted by the ad industry and it makes people shiver when reading it. In our case it means "personal search customization", meaning you can customize the experience as you prefer (UI, domain rewrites, search providers, boosts, etc.). We don't log or track any search queries. I've fixed this in a couple of places but it seems I missed some others, so I'll be fixing it promptly.

Meanwhile, I hope that answers your question? Let me know if you'd like some further clarification.