Part of the problem may be the bonus experience from achievements - I have ~ 400 more games than Kamoba, for example, but he has higher rank than me in pilot. A lot of that may be due to the fact that I completed a lot of the easy achievements pre-MM without achieving level 15. Still, though, I'm not sure this is actually a problem. Constant leveling up is good for morale on the part of new players, so I don't see much of a problem with it.
Keep in mind that I've put close to 350 hours into GoIO, and 200+ hours into piloting alone, which is more than I've played Skyrim, GuildWars 2 and Borderlands 2 combined. Yet, I have multiple max level characters in GW2, have finished Skyrim's main quest a number of times, and so on. There are certainly those who have played more, but I'm not yet max level and I can't help but feel that asking players to devote entire weeks worth of time to reach max level is a bit elitist at best - ergo, I think the current leveling speed is probably fine.
And for those who say levels don't matter, they underestimate the influence large numbers have over player's egos. Certainly mine is affected the closer I see my rank creep to 45.