The 2011 release is pretty disappointing. Using the All Lines shapefile generated a match rate that was 2 percent lower than the 2010 version. Tellingly, the number of records for the 2011 table is substantially less - whereas the 2011 table contains 2150073 records (for all of Illinois), the 2010 table has 2182607.
Including the new Address Range shapefile as the alternate name table reduced the number of matched and unmatched address, and increased the ties. Roughly three quarters of the new ties were from the matched pile and the other quarter were from the unmatched. This applies to both the 2010 and 2011 All Line locators used. Essentially, the address range shapefile is useless.
The TIGER/Line website states that the 2010 Shapefiles page will be released on a rolling basis through 2013. I would have thought that the 2011 release would use 2010 as a baseline for further improvements, but from what I can tell, 2011 is inferior to 2010 (at least, for All Lines Illinois counties). Obviously, the 2011 release still has a lot of kinks that need to be worked out.