Jeffa, people in advertising are just morons really... so they thought they'd go with an "Olde English" theme... whatever that means! I mean really you're dealing with people to whom British history 9th century to 17th century is all the same. It's not a new campaign, it's just the same major product they're feeling the need to constantly shout out about... but you can't just show the same advert over and over again (they try though!)
So what they've done, is they're just shouting out themes in a board room to disguise the monotony of their entire advertising campaign since they first started. "Ancient Egypt! Space! Olde English!"
"What was that last one?"
"Y'know, Olde English... like King Arfah and Robin 'Ood and stuff like that."
"Brilliant! Let's go with that... I've got it! We can say 'They tasteth... too good.' Did you hear that? Tast-ETH!"
"What's tasteth then?"
"It's Olde English style innit?"
then the small voice of the one person with a shred of intelligence... "Actually you can't say 'they tasteth'"
"What?"
"It has to be 'they taste'"
"Yeah, but then it doesn't sound Olde English!"
So the answer is... they don't care... they're a bunch of morons advertising a product TO a bunch of morons who don't notice. And us who do notice don't matter, because we're in the minority.
And people watching go... "Hehe... funny... like Robin Hood or sumfin... they tasteth too good... Hehe... funny... it's all Olde English style... oh, I'm so hungry."