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I am new to Full Text Search, I used the following query
Select * From Students Where FullName LIKE '%abc%'
Students table contains million records all random and look like this
‘QZAQHIEK VABCNLRM KFFZJYUU’
It took only 2 seconds and resulted 1100 rows. If million record is searched in two seconds why I would bother using Full Text Search ?!! Did Like predicate used the Full Text Index as well?
I think you have answered your own question, at least to your own satisfaction. If your prototyping produces results in an acceptable amount of time, and you are certain that caching does not explain the quick response (per Paul Sasik), by all means skip the overhead of full-text indexing and proceed with LIKE.