I thought I would ask this question on the forum rather than message Mike direct. Then everyone can take advantage of any knowledge gained from it.
I bought a GT90 5wt to use on my Hardy Sintrix 9'6" 5wt, this was before Mike had the Small Stream lines in stock. Last year I fished the lower Itchen with it for Brown Trout. This year we have booked it again and also the Test main river and side streams. I wouldn't say they are Streams, but they aren't wide rivers either, I've posted some pictures.
The GT90 is a delight to cast but I found it didn't load the rod quickly after retrieving in a shorter space, I hope that makes sense. So casting to the middle of the river to a rising fish took 3 or 4 false casts to load then a couple more to shoot the line. When fishing one of our lakes I found the GT90 to work much better and got some good lengths.
I wouldn't say I was a poor caster, or a middle of the road type either, I can hold my own and put a fly pretty much where I want it, within reason, but I'm definitely not an expert.
My question is, would a Small Stream line load the rod quicker?
Here's one of our rivers...The Lower Itchen