My opinion for what its worth (not a lot!):
They really missed the point in following up the gorilla ad (which had the potential to work so well as part of a series.......body-popping lions anyone?.....Oooh now I'm imaging the potential for merchandising too.....anyway, I digress).
The thing which made the gorilla ad so good was the visual - that close-up of such a lifelike gorilla really demands your attention - THEN the song kicks in as an added bonus (being a popular somewhat forgotten/nostalgic hit). It seems to me that with this new ad they thought the track was the most important thing and neglected the visual.
To put it in simple terms - I can watch stunts better than this on Top Gear, but where else can I watch a drumming gorilla?!? It just doesn't have "the youtube factor".
No doubt it will get more attention than it deserves due to people like myself making the effort to see it in the hope it would be as entertaining as the previous advert - its not going to have the impact of that gorilla though.
Also the track used is all wrong. "Something in the air tonight" worked well as its a somewhat melancholy track not often used in TV ads. "Don’t stop me now" on the other hand is your typically upbeat track I can just imagine a sofa company using - it helps the ad fade into the background noise of the TV ad break, as opposed to jolting a distracted viewer to pay attention.
AND FINALLY. I've got a problem with the whole truck thing. The gorilla ad was confusing initially as it obviously has very little to do with chocolate - however, noone sells gorillas so that’s ok: When I say, 'have you seen the gorilla ad' that person knows I'm talking about the Cadbury’s gorilla (what else could I possibily be talking about!). However, this new ad looks like an ad for something to do with cars - when I now say, 'have you seen the ad with the trucks'? Its doesn't have the same effect. I would have at least had a Cadbury's truck in there!
Anyway, sure many will disagree, but that’s what I think. No hard feelings. Thank you and good night.