I wouldn't compare IAE with CFM - the only similarity is that they hang off the same airframe.
The IAE has a smaller diameter intake, it has an extra spool (if memory serves correctly) and it needs to be cranked prior to light-off. I'm sure that all those factors have resulted in the crosswind capability comment.
Which leads me to this: is 35kts actually a limit? My company thinks not - nor do I. The wording in FCOM LIM is 'This engine is capable of starting in crosswinds up to 35 kt.' The bush-lawyers might say it IS a limitation, but I would argue that it would need to be worded similarly to the wind limitations in the 'Environmental Envelope' section.
If the the maximum crosswind for engine start was a limit, I suggest it would be written as, eg, 'Maximum crosswind for start...35 kt'.
I read '...is capable of...' in the same spirit as 'Maximum demonstrated crosswind...'. It's the maximum experienced in testing, but is no hard limit.
My two cents worth.