Not at all. This just searches multiple search engines at once and presents you with the results from all of them on a single page.

What is the point of all these proxy search engines if they rely on the centralized servers’ indexes anyways?

Correction: it’s not even the indexes it’s the results. So really you still have no control over things such as the pageranking.

Make sure you understand volume block size before you start using it. It has a big impact on compression, performance and even disk utilization. In certain configurations you may be surprised to find out as much as 25% of your disk space (in addition to parity) is effectively gone and it is untrivial to change the block size after the fact.