I don't know how you may overcome it but I may say that there is a problem when importing text from DWG.
In AutoCAD there is with aspect (max=1.0). If it is smaller than 1.0 (e.g. 0.

, when text imported in ArchiCAD it gets back to 1.0 because there is no such feature in ArchiCAD like "font with aspect".
Avoid it in ACAD and you'll have less trouble in ArchiCAD.