Why is there a suggestion that Glock helped Hamilton?

If you check the last lap times for the two drivers still on dry tyres their times are 1:44:731 (Glock) and 1:44:800 (Trulli). this would suggest they where wrong to stay on dry tyres when everybody else did 1:20's and 1:30's.

Greatest finish to a F1 grand prix ever in my opinion :)