The DVD limitation was always a known disadvantage for the 360, and it was known from day one, but it was a calculated risk which has worked in their favour since they were able to launch 1 year ahead of the PS3.
It was known that eventually the DVD limit would start causing compromises with games as developer felt more comfortable making games with the hardware, and thus become more efficient in creating content in the same amount of time as it took to make generation 1 games, it was just a matter of time.
Now the compromises are only apparent on some type of games, since not all games require such amount of data, thus far it seems that the most affected genre has been the JRPG,Lost odyssey, blue dragon, star ocean and now FF13 and even RAGE will all require more than DVD.
The issue will get worse, it's not about being lazy when swamping discs, but the limitation it imposes on the developers and the game they are trying to make, and this is something that no gamer wants regardless of what console they own.
So lets be honest, all this info from developers lamenting the DVD limitation should come as no surprise since it was a given, after all each generation game data has kept growing and this generation is no different.
my 2 cents on this matter.