google-search
Doing a Google search is normally very fast, despite the fact that the web has probably millions of terabytes of data, due to the fact that Google employs algorithms (like indexing) which allow for very fast searching.
Is it possible to do a search that will cause Google to take much longer than normal (say, a couple of seconds)? I am thinking for example, of using a search term that is obscure and contains various operators, so that it wouldn't be searchable by index. Is there such term?
I don't know about the technical details of the implementation of those other sites. However, if there are sites that don't use account or cookie prefs to know what you normally search, I would expect nothing less than different results.
Google has been personalizing search results for years to give you information tailored to your needs. Recently, Google search results have been more explicit, displaying search results based on what people in your friend network work have shared. Also, see ratings and reviews on Google Places, for example, where your ratings and those of your friends modify your results giving you better, more personalized information.
For finding all google result from 2011-12-31 till 2012-12-31
You will get the same by using the custom range search option
Unfortunately you can't search for past 2 hours using the same method.
Best Answer
I think the assumption here is that Google can find webpage content that isn't indexed. However, Google will only return results for indexed pages. Therefore, I don't think it's possible to create a search that would take a couple seconds. If a keyword search isn't found in the index, it would simply return as a "there are no results" page.
If anything, I think running a search against a term that is commonly found would take longer, since it needs to run through all searches, and return each page and highlight the occurrence of the keyword. That's total conjecture on my part though.