[QUOTE
The other really annoying thing is that I am entitled to expedited clearance through U.S. immigration but couldn't use it because they didnt have a "lane" system at DFW - just one insane queue.[/QUOTE]
Are you refering to Global Entry as your form of expedited clearance?
If so, there are several - at least 6 - GE kiosks in the international arrivals
area at ORD.
In general, I agree with previous posters regarding the relative ease of
entering the US at ORD, compared to several other major entry points,
such as MIA, LAX, JFK, IAD, etc.