Steps to repro:
1. Open the attached project and a scene "test1"
2. Press Play
3. Observe, that the Adam_newloop object runs faster using the new loop method
Note: animations are identical.

see the video: http://screencast.com/t/WhZNI9n8gQT

Steps to prepare the project for repro:
1. Create 2 animation controllers
2. In the first one add two identical animations and add transitions both ways so it would loop, f.e. http://prntscr.com/38ovwd
3. In the second add the same animation and add a transition to itself, f.e. http://prntscr.com/38owf9
4. Add these controllers to Animator components, f.e. http://prntscr.com/38owr2