To defend the romance genre slightly, speed is a necessity but just as often an elapse of time is passed to give this effect. Also extraordinary events could very well have accelerating effects. But the first is a fair criticism.
The second is also a fair point, if the writer wanted to make it romantic with the necessary changes. I do prefer this depth in growth of a relationship, though the effect isn't lost, their friendship is noticeably closer than most. I would only retort that the other pairings were also not rushed.
I think of writing romance like building a building. An extraordinary event, like two people meeting and befriending each other for the first time, is like the foundation of this building. Other significant events to a lesser extent are the floors. It's important yes, but without beams and columns and sheetrock to lift and hold the floors together, then the entire building starts ceasing to exist.
You can have all the major moments you want, but if you do not follow up on that, then it's pointless to have them there in the first place.