"Teaching hours are generally shorter"
Guess it depends on what you mean by "teaching hours". Most unis' base packages are for 12-16 hours per week; last I heard Web had you on the hook for 25 a week. Most private training centers follow the same pattern.

Web in Suzhou has generally been a revolving door...most teachers haven't stayed there long. Web Suzhou is not particularly dishonest; people just tend to quickly decide that the deal you get there is pretty lousy. Local teachers seem to regard it as a contingency job...Web's pretty much always hiring (see "revolving door", above), and it's seen as a place to get a job to hold you over until you find something better.