Does the length of your rod matter or is it how you use it?

I ask this because I've got an 8'6" #4 for general dry fly fishing on mid sized rivers, but I've been thinking of getting a 9' or 10' #4 rod for winter Grayling nymphing.

Should I bother or not?

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I've been grabbed by the shorb & furleys.

The best reason to get a longer rod is that "you want it", not sure it will make any difference to your fishing, but it is nice to have one that you want!
All the best.
Mike

A longer rod will give you better line control and so better presentation of your flies.As long as there arent lots of obstacles of course.A longer rod also helps present heavy (Czeck)nymphs better as well.
Steve.

I do have a 9' #5 but use that for stillwaters but been looking at the new Greys XF2's in 9' or 10' in a #3 or #4 for Czech Nymphing on the Wharfe, I hate all this fly fishing lark & ruddy temptations

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I've been grabbed by the shorb & furleys.

I love my 10-4. It is soft, light on power, and no good to cast more than about 50' (because of the action and the responsiveness). It isn't responsive and certainly isn't a casting rod, but it is light in the tip and sensitive. I built it for light nymphing and it is truly a good fishing rod. I've seen, but not fished the wharfe. If I were going for a nymphing day, I would have this rod rigged and ready before I left the house. Perfect fit for that.

If I wanted a dry fly rod that would also nymph, I'd have my 8'9" 4 wt. Completely different beast.

Thanks,
Rick

The longer rod is better for Czeck nymphing, Iuse an original Streamflex in a 10foot 4 weight for this purpose.
Steve.