#Ludagate is for stoner idiots that never took a music theory class. Drums keep the tempo (usually) in any given pop / rap track. The off beat is not the beat. Next people will be freaking out about ska guitar. Examples to follow:

I Got Five On It - Urban Takeover / Aphrodite / Mickey Finn

The track starts out with the regular 4/4 ~60 Beats Per Minute rap tempo, at about 22 seconds in, which is the backbone of all drum n bass, then proceeds to 120 BPM at about 1:06 (double snare)

At 1:50 the main rap 4/4 60 BPM breakdown hits with the hook sample chorus. At 2:34 it goes into the simplest of jump-up Drum n Bass beats.

4/4 60 BPM:

4/4 120 BPM:

Drum n Bass 175 BPM. It still uses the 4/4 as the main underlying backbone, it's just sped up with flourishes added. If you dance to it at half speed (every other snare) it's still the same old 4/4 rap song beat.

Another D&B example with the second snare hitting an early off beat, second kick drum missing. The underlying tempo remains the same. D&B used to sample old jazz tracks (amen break) which is where all this comes from.

You can mix every single video I've linked in this thread so far on top of each other, as long as you beat match. The foundational timings are all lined up. Random D&B megamix showcase: