CAT 2013 aspirants should note that Data is represented in two or more different types of data sets.
It could be combination of a table and a graph or two or more graphs. You may have to correlate the data in different data sets to solve these questions.
Thus interpret ting data takes time. These type of sets are very common in GRE. However since CAT is going online, there is a good chance that these sets may figure in CAT as well.
However our gut feel is that if such a set comes in CAT, then it would not be heavy on data and be an easy set to interpret because of the limited space on the computer screen.