Well, that would be the smart thing to say, even if they didn't think that.
if they were disappointed in that scenario they probably would have said something like "We're committed to seeing him develop properly, and we trust that he feels another year on his current team will benefit him the most."
I think they're fine with the timing being what it is. Obviously you'd like a guy showing those kind of results contributing over here ASAP and weird things could happen around the expansion draft that might make us a little more anxious but for now it's nice to have him developing in a place that doesn't see us burning a year off his contract. Especially if we're turning Greenway and Kunin pro next season.