I just started fishing with a character (> lvl 35) with sub 200 fishing with whom I had not fished with since the patches to introduce achievements was introduced
Within 8 casts I got the 1 ring (11.30 to 11.35pm) where Lil Timmy spawns in stormwind along the canals. I continued until I leveled fishing to 225 in the SW canal (buying the white kitten from Lil Timmy as he spawned).
Then went to IF to get the pre-quel to Nat Pagles quest, then went to see Nat Pagle to get the quest. Since getting the 1 ring the big iron fishing pole was equipped for the whole time, and did not swap it out until after I finished Nat Pagles quest.
The main fishing point here is I had not fished from the patch since when achievements were introduced. I started with the Savage Coast Blue Sailfin (hearthstone at Booty Bay) . When I cast I got the Savage Coast Blue Sailfin first time.
The interesting point as far as achievements went, is that it triggered the achievement that the character had successfully cast into a fish pool when getting the Savage Coast Blue Sailfin. This was even though the cast had been made into open water.
I then proceeded to go to the relevant locations to catch the other fish. Each required only one cast to get the fish though for the last one - which was the Feralas Ahi I - did use a lure.
I then decided to go to IF for Ol' Ironjaw to see whether this extraordinary run would continue. It didn't.
Leenna