Well, they said the skill up rate would double. So now you get 0,1 for 2 hours of fishing instead of 0,1 very 4 hours...
Ok, maybe a little exagerated, but you get what I mean, still pretty slow.
Keep in mind it is still a considered a craft. In regular crafts, you have faster skillups (at early-mid levels anyway) but other limitations, like the money to buy material and the ability of it. It slows down the leveling so not everyone is 100 within a couple of months.
In fishing, there is no limitation of material and the investment is substantially less (I am only 18, it might be more expensive as you level, but I have no idea). If you were to get skillups every time you cast your line, everyone would be 100 in 2 weeks. So to slow it down, skillups are much rarer then regular crafts.
It gets annoying not to see that yellow line for 30-45 minutes, but keep in mind you are still making some money, even a few, while you wait for it, unlike other crafts.