Distiller's yeasts can be used for high gravity ales, but you have to keep the fermenter cool (around 60F works well). Those 48-60 hour ferment times are at 80F of higher and you will get loads of fuesel alcohols and other foul tasting stuff.
Just for grins I tested Turbo Yeast with three pounds of cane sugar in a gallon of water. It got up to 92F before the yeast died. Stunk! Most sources recommend that you add the sugars in stages to avoid overheating.
So far, I've restricted actual use to secondary fermentations of barley wines and high gravity ciders. I let the reqular yeast run down, then add the turbo yeast.