We'll see

I'll let you know how it goes. I wouldn't call the performance average, though.
Step 1:
MRVEX Prospectus (pay attention to the bolded part):
The investment seeks capital appreciation.
The fund invests at least 80% of assets in value-oriented common stocks of medium-sized companies similar in size to those within the Russell Midcap® Value Index. The Adviser selects companies that exhibit traditional value characteristics, such as a price-to-earnings ratio less than the S&P 400® Index, higher-than-average dividend yields or a lower-than-average price-to-book value. In addition, these companies may have under-appreciated assets, or be involved in company turnarounds or corporate restructurings.
Step 2:
Google "Russell Midcap Value Index" and you'll find the iShares version.
Click on the MorningStar link which is the 5th one.
http://quote.morningstar.com/etf/f.aspx?t=IWS®ion=USA (MorningStar is a great source)
Step 3:
Compare them.
MRVEX vs. IWS 1 year performance:
http://www.google.com/finance?chdnp...=98532&cmpto=NYSE:IWS&cmptdms=0&q=MUTF:MRVEX&
MRVEX: +31.14% (Actual performance with management fees taken into account: +29.5%)
IWS: +31.25% (Actual performance with management fees taken into account: +30.92%)
MRVEX vs. IWS 5 year performance:
http://www.google.com/finance?chdnp...493051&cmpto=NYSE:IWS&cmptdms=0&q=MUTF:MRVEX&
MRVEX:
-10% (Yes, that is a negative...Bolded for emphasis)
IWS: +9.42%
Expense ratio:
MRVEX: 1.25%
IWS: 0.25%
Also, note that performance results doesn't include management fees.
"Actual" 1 year performance with management fees taken into account:
MRVEX: +29.5% is left for you after the managers take their cut.
IWS: +30.92% is left for you after the managers take their cut.
"Actual" 5 year performance with management fees taken into account:
MRVEX:
-11.13%(Yes...That AGAIN is a negative) is left for you after the managers take their cut.
IWS: +9.15% is left for you after the managers take their cut.
Conclusion:
You are paying 5x more fees to your fund manager to get the same(at best) or worse performance given they hold mostly the same stocks in the Russell Midcap Value Index.
How do I know this?
Because I used to be a holder of PRLAX many years ago until I found the iShares Latin American ETF version which charged ~0.3% expense vs 1.25% for PRLAX. I was stupid 5 years ago. I am less stupid now.
Management fees are hidden if you're someone who doesn't know where to look. If a fund is charging a 1+% management fee, they better prove to me that they're well versed in the art of stock picking. Don't pay a 1.25% expense ratio for a fund that tracks or "mimics" an index, or attempts to do either.
Protip: Don't even bother comparing performance from 2002 to today, because you'll shoot yourself in the foot after you see it.
http://www.google.com/finance?chdnp...899972&cmpto=NYSE:IWS&cmptdms=0&q=MUTF:MRVEX&
If after all this, you still feel "Everyone knows best on the interweb"...Well, I don't know what else to tell you.