Text that is pasted into a model (for example in an outline, or pasted into a field in an Organization Chart position) will have the attributes of the text, not the model. In other words, if you copy some text that is plain and paste it into an outline, the text will be plain. Even if that level of the outline is set to bold, the text will be plain.
Of course you can then select the text and change its attributes, or you can reapply the model or element style and the text will take on the new attributes.