I agree with other posters. Flows at the end of May are highly variable! I pulled some quick historical data from USGS (Agness Gauge).
May 25, 2008 - 8,860
May 31, 2008 - 7,650
May 25, 2007 - 3,020
May 31, 2007 - 3,750
May 25, 2006 - 6,310
May 31, 2006 - 4,650
*2009 doesn't seem to be available yet.
While I thought this year was going to be a low water year for Oregon, things may be changing. It has been very wet heading into spring and the last couple of weeks brought substantial precipitation. I think, at this point, it's hard to guess what water flows will do.
In terms of canoeing, I have heard that people occasionally canoe this stretch, but I'm not sure I've ever seen one. I certinaly wouldn't recommend it for anyone without solid whitewater canoe skills.
As with any river, there are challenges to both high and low water. I agree many places on the Rogue are easier at high water (drops smaller, Telfer's rock under water, other options at Blossom, etc.). That having been said, I would think that the Rogue would be more canoe friendly at lower flows when it's not as pushy and fast feeling. Keep in mind that this is coming from someone that does not canoe. I think each boater has their own perspective on when the Rogue begins to feel pushy and fast and I think it is largely dependent on the craft and the boater's experience. To me, it seems like 6,000 cfs would be a little pushy for a canoe. Just my thoughts...