Mesh with various objects and textures

I am reading the DTS/FAQ/3ds Max FAQ , and i have one question about this :

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Are there any issues that I should be aware of if I use a multi/Sub-object material on my model?
In fact there is. Using Multi/Sub-Object materials on your models can affect the performance of the engine. When you have multiple textures on your model, the engine must draw (and keep in memory) an instance of the model for each texture that is applied to it. So if you have 2 textures applied to a node and that node is 500 polygons, the engine will actually have to draw 1000 polygons and keep that data in memory.

As such, although you can do it, you should be aware of the consequences involved in texturing this way and know that it is highly recommended to use only 1 texture per model.
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if i make model in 3dmax, with various objects . for example i am making a house , and its is compose by a door , roof , window, and the cube of the house. each part ,is a separate model with its own material , texture and uvw mapping . i am exporting like this:

start01
roof2
door2
house2

my question is, if the model is also draw several times for each texture ??? like using multi/sub-object???