Loop Loft MIDI in EZDrummer 2?

For the first 3 volumes yes.  After that loops are generally the right size.

That thread might have been mine, I certainly had that problem.

If you drag and drop a MIDI file into an open Sonar project it can't/won't change the tempo.  But if you instead open the MIDI file as a project, Sonar can set up the project with the MIDI file's tempo, if it has one.  This is true of all MIDI loops, not just Loop Loft's.  That said most/all of the Loop Loft MIDI files don't appear to have tempo settings in them so it may be a moot point.  Not sure if them having a MIDI tempo event in the file would work for EZDrummer's use original tempo setting.  As a rule with all the Loop Loft products you may have to manually set the tempo as needed.
 
The Loop Loft MIDI files also are all mapped to a GM-style mapping, which can be a pain.  I have EZPlayer Pro which has features to help remap files but to be honest I think it's UI is awful and the results somewhat less than satisfying in that area.
 
One thing Loop Loft doesn't tell you is that they update the bundles, so in the future when new MIDI volumes are added you can go back and open your downloads and download the new volumes.  Which kind of makes the bundles a bit better deal.  Though they don't tell people about this, so perhaps it's just a web site bug and one day they will fix it.
 
As for the MIDI loops being useful, I have had mixed luck with them.  They really need a lot more tagging for searches and a search engine.  EZDrummer and Addictive Drums 2's MIDI loops have been a bit easier to use.