A First World Problem: my YouTube app took fifteen seconds to buffer before playing cat videos.
It seems like a silly thing to whine about. Mobile broadband speeds will vary, not just by carrier, but by reception, network load, and your device itself (LTE, HSPA+, 3G are all commonly in use, and provide less and less speed, respectively).
Still, the FCC wants to make sure that customers are getting what they pay for. Plus, with all of the merger talk over the last few years (AT&T's near-nuptials with T-Mobile, then T-Mobile's pairing with MetroPCS), the agency wants to know if we have a competition problem.