Barclays PLC (ADR) (NYSE:BCS) (LON:BARC) recently held its annual Global Financial Services Conference, giving banks an opportunity to air grievances about the regulatory environment, or to alter guidance for investors ahead of third quarter earnings. For all of us unable to attend, here are their ten most important takeaways from the conference. Barclays’ Macro banking takeaways 1) Loan Guidance Growth is in line with 2Q13 earnings calls Comerica Incorporated (NYSE:CMA) has 3Q13 loans down 2 percent this quarter to date, while East West Bancorp, Inc. (NASDAQ:EWBC) and Signature Bank (NASDAQ:SBNY) have raised guidance slightly. A large majority of banks are calling for modest…