Kevin:

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If an entity object obtained data,moved records etc.etc. on the table - would this hinder performance?
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Yes because you are basiucally wrapping the data into an object.
However, the performance degradation may be negligeable.

I use business entities and business managers extensively. The largest uses about 50 entities of 30 different types (but only one manager) and the time it takes about an extra half second to instantiate the entities and load data into them. The entities allows me to construct an interface where users can nest edit sessions up to 10 level (I can increase that constant any time I desire). The advantage is that allows me to "rollback" to the starting point of any edit session with no effort (in reality, nothing is written to disk until the Save tool is clicked). This is extremely important in several of my applications in which the users may build deeply nested scenarios.

Daniel