Guess its based on experience - we generally deal with incidents ourselves, be it lost runners / turned ankles / simple breaks or just logistics of the event. VHF with a repeater suitably located covers our events more than adequately and I'd argue gives significantly better response times than people with sat phones / mobiles. There is always someone with a handset and mobile that is in range who can call for outside assistance if it is required.

Only once I can think of where high winds and rain inhibited the use of a radio on Robinson but that would have been the same for a phone. I guess as you say text would help. For me the benefits of all event com's and response times to incidents far out way the issue of wind :-)

If I really thought this was an issue I'd buy a throat mic and ear piece. I used one in a very noisy environment once and it did a great job.