I'm not sure if "huge" is exactly how it should be described.  We've hit levels as high as 0.6% month-over-month growth this year, though year-over-year we're still running at only 1.6%.  There can be a fair bit of volatility in month-over-month numbers.

If we did indeed have 0.4% growth every single month for an entire year that would give us 4.9% year-over-year growth which would be pretty impressive, though not unprecedented.  We had (slightly) higher annual growth in 2000.  However I don't think anyone in their right mind expects that kind of thing to happen this year or next.