There is usually more information in a given dataset than one would expect. The Austrian Post scandal has demonstrated this impressively and gives a faint idea of what Google is capable of doing, especially as the information grows faster than linear with the amount of data.
So having more data provides you with more information, however, also quality, correlation, links within the data play a major role on the information yield that can be achieved. There are many methods to extract information from data. Correlation analysis as a usual starting point that can indicate where to drill in afterwards.
Provide me with your data and I analyse it for you. This is a job that easily gets lost in the chores of daily business.