Many of the anomalies Are very difficult to see in tracks.
The best I can tell you is that if you have played the sim for long enough you will defiantly notice things that are just not right..
Best recommendation is to boycott any servers allowing mods.
This will remove any doubt about a pure clean server experience.
More of my findings here..
http://8raven8.proboards44.com/index...ead=1197822602