Take a rough look on a dollar-weighted basis. If they are concentrated in a couple of high fee funds, those will dominate their costs despite their also having a lot of small positions in less expensive funds.
Ah, good point. I took a look at some high ones and saw front loaded fees up to 4.25%, deferred fees @ 1% for others, and probably close to .8% expense ratios. The more I look into this, the more disappointed I'm getting.
I did a back of the envelope comparison of my Vanguard IRA accounts compared to their IRAs (mostly stocks/mutual funds) for the past 10 years, and I doubled my account while they didn't even come close to that.