Dominique,
One more thing...
Even with a solo flute this is noticeable to me. I am satisfied with high solo woodwinds from VSL when placed in verb. But satisfied doesn't mean the same problem isn't present. It's just not as much of an issue as it is with other instruments.
The instrument when recorded wet seems to marry the surfaces to create a unique shape, which then tails into the room. The immediate response of the room still is different on a solo flute. But it works. However, when I try to blend woodwinds into an ensemble or section, I feel like the lack of this shape prevents a natural blend. Because of that I don't use the ensemble woodwinds at all anymore, nor do I use the woodwinds to create a section. I stricly use them as solo instruments. Granted, I don't have any of the dimension series so that jury is still out. But it's hard to convince myself to go dimension when I feel like I still have a reverb issue. Plus I really don't have the computer for it. Though that's changing soon. :)
I just wanted to describe a bit more of what I've noticed. I fully anticipate being called crazy after this! lol But I think it helps to illustrate a different angle to the same problem.
-Sean