No, it probably took you so long because you actually learned to play a 5 string! The people who say they got comfy in a few minutes either are prodigies, or are only noodling around with a few low notes and don't really play a 5er.
So how long does it take to get comfortable with a new neck size, and learn a bunch of new scales and fingerings and incorporate them enough into your playing that you can gig? My experience is about a month, maybe more, maybe less. A 6 string is the same deal but takes a bit longer because the neck is so wide and takes some time until it starts to feel natural. But learning a 6 IS the way to learn a five because the 6 forces all the proper technique which includes dealing with a wide neck, scales across the neck, proper damping of strings above and below the one you are playing AND using the extended range musically! Dropping back to a 5 from a 6 is a piece of cake.
You might also think that one could easily drop back from a 5 to a 4 but it really doesn't work well. The 4 has too limited a range at any given spot and it forces you up and down the neck. So to me I see a 4 and 5/6 as two different instruments played in different ways.
The problem as seen in this and many other threads is that a lot of people start out thinking that a 5 string is just a 4 string with a couple of lower notes. And yes, one CAN play it that way. But if you do, eventually one decides that 5 strings are a waste of time and that 4 strings are really all one "needs" in a bass. But the truth is these people know how to play a 4 string bass but don't know how to play a 5 string bass. So their advice is a lot like a guitarist telling you what bass to play because his 4 lowest strings are tuned sort of like a bass. Sorry different instrument!
The problem *I* see with the above is that it doesn't take into account the differences in genres of music... For example, I play in a rock cover band that ranges from 80s and 90s rock, to modern rock... The 80s and 90s stuff can mostly be handled with a 4 string, but alot of today's current rock requires being able to get down to low B, and sometimes even lower... So, the blanket statements above really don't pertain to *my* situation... Sure, I use my 5ers to go lower than standard E for the most part - but who's to say that's wrong, when it suits my musical needs???
I *could* just play most stuff on a 5er, and be done with it, but alot of rock covers require open notes that just don't work as well as fretting the same note on a 5er - and since I typically play around 50 songs during a 4 hour gig, it's no biggie for me to bring a couple of basses, and make things easier on myself...
Anyways, the point is that not everyone's situations are the same...
- georgestrings