Nah, that slime is the right thickness. This trend towards colored water being passed off as "slime" (looking at you, UK) has been bugging me for years.
The girl also has great hair for slime. Those angular cuts don't get enough love. And I don't know if she's Dave's GF, or just his bandmate, but poor girl has been getting covered in slime for a few years now..... What a trooper!