Tech geeks, please help me out here with my stats.
PSK31 Baud Rate is 31.25 or Avg Speed of 44 words per min with a bandwidth of 80Hz.
PSK63 Baud Rate is 62.5 or Avg Speed of 88 words per min with a bandwidth of 160Hz.
PSK125 Baud Rate is 125 or Avg Speed of 180 words per min with a bandwidth of 320Hz.
The most popular is mode is 31. But I like 125 because of the speed. 63 is twice as fast as 31 and 125 four times as fast as 31. You can easily spot 125 because of the fat line on your waterfall, but are only in short burst.
So if I'm working a pile-up I like using 63 or 125 just because of the speed. Also it seem that stations who know how to switch to 63 or 125 are not newbies. They know their software, hand how to use macros. They don't hit the "brag" macro and give you their life story when you are working a pile-up.