Heir Apparent and musical terminology question

[Dante's Inferno]

Okay, so I am currently learning Heir Apparent on guitar based on the powertab found on Ultimate Guitar, where suddenly one thing confused me.

          |----5:3----|
   E   S  S  S  S  S  S  S  S  S  E  S    S   S  S  S  S  E.  S  S  S  S
|--------------------------------------|-----------------------------------||
|-12-----11-12-11----------------------|----------------------------------o||
|-----13----------13-12----12----12----|-----------15-16-16--16-13-13-13---||
|-----------------------14----14----14-|-13--14-14-------------------------||
|--------------------------------------|-----------13-14-14--14-11-11-11--o||
|--------------------------------------|-------------------------0--0--0---||

That thing in bold and italic (5:3), what does it mean? I'm trying to listen to the song while looking at the tab, but I see no logic.

[Illidan]

Five triplets? Maybe it was at 5:30 in the song and it's a typo? Not sure, really.

[Dante's Inferno]

No, it's not a typo, I'm pretty sure of that. I've seen it before in tabs, it's some sort of odd rhythmic grouping (like triplets, only a bit more advanced, I think).

[Luann]

if it's a polyrythm, it means 5 notes in the place of 3.
It's funny when people write this kind of things in a tab, it's like trying to draw something, and then you write over it a complex phrase since the drawing can't express that.
Shitty example.
I don't see the point of writing that rhythm on the tab....

edit: there are 5 notes in that fragment, so maybe it is 5 notes, but this is weird.

[Detective Clarence Beauregard]

It means that five notes are played in the time it normally takes to play three sixteenth-notes. If the wording is confusing, imagine it like this:

E S S S S S S S S S E S

The first eighth note (E) and the first sixteenth note (S) take up the first 1/4th of the measure (which is 6/8). The next five S notes are the second 1/4th, the next three S notes are the third 1/4th, and the last E and S notes complete the measure. Basically, you're pushing five notes into a space where there should normally only be three sixteenth notes.

E S / S S S S S / S S S / E S

[Dante's Inferno]

That's what I thought. Well, feared would be a better word. Any tips on how to learn that? I guess I should just practise practise practise.

Okay, thanks guys.

[Detective Clarence Beauregard]

It's a difficult thing to get a "feel" for; it's very mathematical. I say just play the five notes really fast to squeeze them in that time. Make the 11-12-11 a hammer-on pull-off deal if you want; the notes are played fast enough that it won't make a difference.

[Arjen W.]

Isn't it just called a quintuplet? It's the same idea as a triplet, but with five notes, as far as I know (I don't know shit about music theory). Heh, I was having a bit of trouble with that little run too. Just start out at a slow tempo.

[Dante's Inferno]

Quintuplet sounds right, yes. At least now I have some clue of what is going on.

[Luann]

Listen to the song rather thank thinking "ok i'm gonna put that 5 notes"

[Dante's Inferno]

Nothing wrong with understanding what you are doing. A car mechanic might not need training to do what he does, but it doesn't hurt. I tried listening, but couldn't make it out.