I think that a cut pecan pie (a piece) might confuse them because the filling is a gel consistency. However, a whole pie looks very solid, so would probably pass. They would probably end up doing an ETD swab on the pan, anyway, since any pecan pie involves some burnt sugar, and the metal pan will draw attention. I'd say that if you are prepared to let them handle it and perhaps unwrap it, you should be OK.
As for consistency, weren't you listening to Chertoff? The inconsistency is
planned, the better to throw the terrorists off stride. (And if you believe that, I've got a nice bridge you might be interested in -- cheap!

)