I think the answer is "it depends". I do like using the curtain wall panel tool and create the panels individually. However if the design is fairly complex and you have several unique patterns on your "typical" panel, then using Dave's suggestion makes a ton of sense. Personally I like separating out each panel so I can build construction timelines either in 3dsMax or Navisworks. So if your BIM process continues where Revit leaves off, at least you have that option. Where-as some people are suggesting it is just a wall with fake joints, good luck.
Yes, I literally model everything, chamfers, joints, openings, etc... in each panel. It is important to me and it is important to the precaster.
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