No, it's not the problem of MEW, it's the problem of Bancor network itself. Bancor network crashed during crowd funding. Not the MEW.
That doesn't explain why folks had trouble sending ETH from POLO and other exchanges to MEW.
Yes it does, MEW tx traffic during Bancor ICO was off the chart, see the post above with the chart from the MEW tweet. (EDIT: see this link here
https://twitter.com/myetherwallet/status/874295898532069378/photo/1 )
what I want to know is if Bancor extended the 1 hour window to 3 hours, how come my purchase got cancelled during that time, and who do I harrass at Bancor about it.