I am planning to. 

Waiting for a gfx card to arrive that should triple my hash-rate (i.e. my current group of devices are equal to the new gfx card divided by two, or close enough).  Then I plan to "race" it against the pool of devices for about a month and see the results. 

Not particularly scientific, and probably not for long enough but should give some idea.  Of course it can be skewed quite heavily by the bounties on vanity names at the time.