I wouldn't use that adjective but I think it fits in the strict definition - it's the style of someone overly willing to please, like a servant currying favour with their master.

I'd probably describe it as saccharine. Or dare I say it [USA] "American"? Over the top, gushing, enthusiasm. It's off-putting to me (from UK) as it's, well, more the sort of thing you'd hear from a toady or, yes, a sycophant. It just seems insincere -- and it is in this case because there is literally no emotion behind it.