I think it's great to see new teams, even HRT doing a shakedown on a GP weekend is brave, if a little reckless. I'm surprised they were allowed to start at all, any car failures could have seen someone get seriously hurt, but it's a dangerous sport and Senna and Chandhok did well.
True, but they had little option. If they had the chance to test before the season started they would have done, but when time ran out the rules dictated that there was nothing they could do. They either ran at Bahrain with no practice, and the safety implications of that, or they don't run at all.
I think Brundle's right, they should all have been given until Barcelona to get their houses in order. Do some proper testing and get up to speed, instead of learning on the fly.
For the circumstances they're entering under, all three have done an excellent job.