I think partially it's a canadian thing...as far as speypages...I learned my casting and fishing for the most part up there and lost a good half season because I was told only knobs fished skagits and tried to use a cnd gps line on a 13 soft rod...was horrible...sink tip on that line doesn't like heavy flies and I struggled mightily...Part of it I attribute to the "classical" learning curve of a british property... Fish our rivers, especially the skagit and you'll understand why that line was developed...your not fishing bars for the most part, your walking out from the trees...try throwing a longer line and the D loop will tangle constantly... I've argued with many that part of learning ANY casting style is the method..what these guys don't get is when your throwing distances over a hundred feet part of the skagit or scandi cast is learning to deal with your running line and having the power stroke to throw it in current.... All that said, I've found that mid bellies etc. don't fit me anymore as I'm just not into the rotation etc. and it's effect on my body all day....I do like the fall favorite or vector line at roughly 50' heads...but again..with a decent running line these heads with long leaders etc. can easily be used out to whatever your max casting distance is...they are a lot easier to cast long distance and will work in good winds too....a mid/long line is normally 110-120' .. with a decent running line 130' in my unskilled hands and 150' in the good guys hands are pretty attainable...So what's the point? On the rivers like the clearwater etc. you need long casts and small flies..so using a mid/long or fall fav. type line is a very good choice....You don't want to be plunking something heavy out there...you use long leaders and small flies and it's a stealth thing to some degree...it's a fuck of a lot easier to use the proper head out there....Most guys using skagits don't understand that with a floating tip on there you need a heavier head to compensate for the weight of your tip...so they struggle trying to throw their winter heads with a floater... All part of the curve and nobody is right....just what you choose to use and FISH IT EFFECTIVELY!!!!