I think this is a bit unfair to be honest, especially on Team Lotus. At Spa both Trulli and Kovalainen finished ahead of Barrichello, and were only lapped once. Irrespective of the way the race panned out (and in Team Lotus' favour, the 2 of them collided in T1), it's impressive for a team in their second year in the sport to achieve that. Do you class Williams as being mobile chicanes? Kovalainen battled hard and managed to hold off Barrichello for the last few laps of the race, despite the obscenely big DRS zone and the lack of KERS on the Lotus, which to me isn't the work of a mobile chicane. Earlier in the season, at China Kovalainen beat Perez and Maldonado, which again, is impressive given the resources available to them.
Yes, Virgin and HRT (if we're covering all the new teams) haven't made the same progress, but they've still made a step forward from last year, and maybe within a couple of seasons will become fully fledged members of the midfield. Having these teams has brought more jobs, sponsorship, and money in general into F1, and the battles at the back of the pack are another thing for fans at the circuit to enjoy (even if they are criminally under-represented on TV). Bar Webber/Kovalainen at Valencia last year, when have the new teams posed a really serious issue to the top teams?