It's true. The aircraft comes from the factory with a max demonstrated crosswind number, but it is not a limitation - you can go beyond that number, but you become a test pilot. Most airlines impose the limitation.

At the company I work for x-wind limits are all based on the steady state wind(says it right in the FSM under the x-wind limits)...been that way for at least the last 5 years.

It lists them by braking action,
good braking 27, fair 15, poor 10

Same for us at XJT on the EMB-145. There is no crosswind limitation. Only a max demonstrated crosswind of 30 kts. Needs to be that way fling in and out of EWR where 30 kts is standard.