Xwind limits for most commercial jets are surprisingly high, I think a 747 is around 40kts take off and 36 kts landing although I'm not a commercial pilot so don't quote me. The difference is that a companies SOP may be a lot lower than manufacturers recommended limits to give a built in fudge factor. Compare a 747 to a Cessna 152, xwind limit 12 kts...although having said that in the POH it does say 'demonstrated xwind limit' which is not the same as 'Maximum xwind limit.'