Probably some grain enhancement from the scanning, too. But don't worry, I see what you meant. You know, in Germany we have a saying about these clouds:"In Frauen und in Zirren kann man sich gewaltig irren." (You can go wrong in women and cirrus clouds. (The reference to cirrus clouds is because they're not a good predictor of weather, plus, it doesn't rhyme any longer ...)). Just thought I'd mention it.
Thats the spirit. I wish I had my 4x5. I carrier a 35mm too and have come to that conclusion sometimes. I develop all my small film in Micro-x to keep the grain as small as possible. in fact I developed all my Point Lobos and Yosemite in it too and I shot 8x10 T-max and it came out great. I'm going to put some of my work up this week if possible.
I don't think the grain detracts from the image at all. One thing's for sure, the scene would have looked different!
I personally think there's a charm to the gritty appearance of 35mm. Try it with Ilford Delta 3200 some time. It's a refreshing experience, and makes beautiful photographs.
Love that sky, Eric!
- Thomas