I'm sorry but I think you need to adjust your definition of normal, as in "putting your foot down in 2nd whilst coming off a roundabout" is not normal - as in 90% of the population don't drive like that. I'm sure the little old dear in her 1.2 Clio or 17yr old lass on her way to college every morning have no issues at all with there £20 ling longs!
I will agree with others though - if you do any kind of spirited driving, budget tyres are a no no. You only have to spend a little more for something like Toyo T1R's (on my Westfield) or Kuhmo KU31's (on my Cosworth) and you'll have a tyre that is leagues beyond the budgets and half the price of premium brands.
are you trolling too? no one accelerates away from tight roundabouts roundabouts in 2nd gear?
the test was to see the level of friction between road and tyre. it was an intentional test, which is much better than having to find out how much grip you dont have when you have to stop in a hurry
i then adjusted my driving to "like driving bare footed when the pedals are covered in broken glass" because the tyres were beyond rubbish