Given how the playing character of a links course can change in a matter of weeks (or even days), I am no sure I see the point of speculating what sort of condition Gullane will be in for the Scottish Open well over 4 months in advance of the event, especially based upon the second hand comments of a source that may or may not be objective or reliable.
In addition, I seriously doubt, barring extreme conditions, whether many, if any, of the pros will base their decision to enter the event based on the depth of the rough, be it high or low.