If krosavcheg owns a series 1 camera then his perception is entirely understandable.
After owning a 1DMIIn, when I held my former 20d again (a friend of mine bought it) it just felt like a toy.
After owning a 1DMIII and buying a 50d, when I held it for the first time it felt, well, the same.
When I placed a 85L on it for the first time I was amazed how front heavy the combo was.
With the MIII, it balanced just perfectly.
Anyone with a similar experience should be able to understand what krosavcheg meant by his words.
The 7D body appeards to be, at least from what I've seen, basically the same size as the 50d.
And while there is a definitely a difference to the rebel line, the difference to a 1 series is much, much bigger.